深入分析Java的序列化与反序列化

亦凉 2022-05-25 02:40 225阅读 0赞

序列化是一种对象持久化的手段。普遍应用在网络传输、RMI等场景中。本文通过分析ArrayList的序列化来介绍Java序列化的相关内容。主要涉及到以下几个问题：

> 怎么实现Java的序列化
> 
> 为什么实现了java.io.Serializable接口才能被序列化
> 
> transient的作用是什么
> 
> 怎么自定义序列化策略
> 
> 自定义的序列化策略是如何被调用的
> 
> ArrayList对序列化的实现有什么好处

## Java对象的序列化 ##

Java平台允许我们在内存中创建可复用的Java对象，但一般情况下，只有当JVM处于运行时，这些对象才可能存在，即，这些对象的生命周期不会比JVM的生命周期更长。但在现实应用中，就可能要求在JVM停止运行之后能够保存(持久化)指定的对象，并在将来重新读取被保存的对象。Java对象序列化就能够帮助我们实现该功能。

使用Java对象序列化，在保存对象时，会把其状态保存为一组字节，在未来，再将这些字节组装成对象。必须注意地是，对象序列化保存的是对象的”状态”，即它的成员变量。由此可知，对象序列化不会关注类中的静态变量。

除了在持久化对象时会用到对象序列化之外，当使用RMI(远程方法调用)，或在网络中传递对象时，都会用到对象序列化。Java序列化API为处理对象序列化提供了一个标准机制，该API简单易用。

## 如何对Java对象进行序列化与反序列化 ##

在Java中，只要一个类实现了`java.io.Serializable`接口，那么它就可以被序列化。这里先来一段代码：

code 1 创建一个User类，用于序列化及反序列化

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      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">package</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">com.hollis;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">java.io.Serializable;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">java.util.Date;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">/**</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">* Created by hollis on 16/2/2.</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">*/</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">class</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">User </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">implements</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">Serializable{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">private</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">String name;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">private</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">int</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">age;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">private</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">Date birthday;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">private</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">transient</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">String gender;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">private</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">static</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">final</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">long</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">serialVersionUID = -6849794470754667710L;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">String getName() { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">return</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">name;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">setName(String name) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">this</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">.name = name;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">int</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">getAge() { </code> 
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     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">return</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">age;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">setAge(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">int</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">age) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">this</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">.age = age;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">Date getBirthday() { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">return</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">birthday;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">setBirthday(Date birthday) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">this</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">.birthday = birthday;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">String getGender() { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">return</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">gender;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">setGender(String gender) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">this</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">.gender = gender;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">@Override</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">String toString() { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">return</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"User{"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"name='"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ name + '\</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">''</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">", age="</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ age +</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">", gender="</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ gender +</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">", birthday="</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ birthday +</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">'}'</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
    </div></td> 
  </tr> 
 </tbody> 
</table>

code 2 对User进行序列化及反序列化的Demo

<table style="border-spacing:0px;width:620px;border:0px;margin:0px;padding:0px;font-size:12px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;min-height:auto;"> 
 <tbody style="margin:0px;padding:0px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;"> 
  <tr style="border-top:0px;margin:0px;padding:0px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;"> 
   <td style="border-width:0px;margin:0px;padding:0px;font-size:12px;vertical-align:baseline;background:none;float:none;height:auto;line-height:1.1em;width:auto;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;min-height:auto;color:rgb(175,175,175);"> 
    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      1 
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      2 
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      3 
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      4 
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      5 
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      6 
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      7 
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      8 
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      9 
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      10 
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      11 
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      12 
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      14 
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      18 
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      19 
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      20 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      22 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      23 
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      24 
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      47 
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      52 
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      53 
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      54 
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      55 
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      56 
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   <td style="width:585px;border-width:0px;margin:0px;padding:0px;font-size:12px;vertical-align:baseline;background:none;float:none;height:auto;line-height:1.1em;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;min-height:auto;"> 
    <div style="margin-left:-10px;width:640px;border:0px;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;min-height:auto;"> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">package</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">com.hollis;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">org.apache.commons.io.FileUtils;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">org.apache.commons.io.IOUtils;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">java.io.*;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">import</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">java.util.Date;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">/**</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">* Created by hollis on 16/2/2.</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#808080;">*/</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">class</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">SerializableDemo { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">static</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">main(String[] args) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//Initializes The Object</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">User user = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">User();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">user.setName(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"hollis"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">user.setGender(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"male"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">user.setAge(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,153,0);">23</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">user.setBirthday(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">Date());</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">System.out.println(user);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//Write Obj to File</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectOutputStream oos = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">null</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">try</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">oos = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectOutputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">FileOutputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"tempFile"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">));</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">oos.writeObject(user);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">catch</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">(IOException e) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">e.printStackTrace();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">finally</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">IOUtils.closeQuietly(oos);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//Read Obj from File</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">File file = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">File(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"tempFile"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectInputStream ois = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">null</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">;</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">try</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ois = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectInputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">FileInputStream(file));</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">User newUser = (User) ois.readObject();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">System.out.println(newUser);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">catch</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">(IOException e) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">e.printStackTrace();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">catch</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">(ClassNotFoundException e) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">e.printStackTrace();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">finally</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">IOUtils.closeQuietly(ois);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">try</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">{ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">FileUtils.forceDelete(file);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">} </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">catch</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">(IOException e) { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">e.printStackTrace();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//output </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//User{name='hollis', age=23, gender=male, birthday=Tue Feb 02 17:37:38 CST 2016}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//User{name='hollis', age=23, gender=null, birthday=Tue Feb 02 17:37:38 CST 2016}</code> 
     </div> 
    </div></td> 
  </tr> 
 </tbody> 
</table>

## 序列化及反序列化相关知识 ##

1、在Java中，只要一个类实现了`java.io.Serializable`接口，那么它就可以被序列化。

2、通过`ObjectOutputStream`和`ObjectInputStream`对对象进行序列化及反序列化

3、虚拟机是否允许反序列化，不仅取决于类路径和功能代码是否一致，一个非常重要的一点是两个类的序列化 ID 是否一致（就是`private static final long serialVersionUID`）

4、序列化并不保存静态变量。

5、要想将父类对象也序列化，就需要让父类也实现`Serializable`接口。

6、Transient 关键字的作用是控制变量的序列化，在变量声明前加上该关键字，可以阻止该变量被序列化到文件中，在被反序列化后，transient 变量的值被设为初始值，如 int 型的是 0，对象型的是 null。

7、服务器端给客户端发送序列化对象数据，对象中有一些数据是敏感的，比如密码字符串等，希望对该密码字段在序列化时，进行加密，而客户端如果拥有解密的密钥，只有在客户端进行反序列化时，才可以对密码进行读取，这样可以一定程度保证序列化对象的数据安全。

## ArrayList的序列化 ##

在介绍ArrayList序列化之前，先来考虑一个问题：

> 如何自定义的序列化和反序列化策略

带着这个问题，我们来看`java.util.ArrayList`的源码

code 3

笔者省略了其他成员变量，从上面的代码中可以知道ArrayList实现了`java.io.Serializable`接口，那么我们就可以对它进行序列化及反序列化。因为elementData是`transient`的，所以我们认为这个成员变量不会被序列化而保留下来。我们写一个Demo，验证一下我们的想法：

code 4

<table style="border-spacing:0px;width:765px;border:0px;margin:0px;padding:0px;font-size:12px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;min-height:auto;"> 
 <tbody style="margin:0px;padding:0px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;"> 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      1 
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      2 
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      3 
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      4 
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      5 
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      6 
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      7 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      8 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      9 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      10 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      11 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      12 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      13 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      14 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      15 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      16 
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      17 
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      18 
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      19 
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      21 
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    <div style="border-width:0px 3px 0px 0px;border-right-style:solid;border-right-color:rgb(108,226,108);margin:0px;padding:0px .5em 0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;text-align:right;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
      22 
    </div></td> 
   <td style="width:730px;border-width:0px;margin:0px;padding:0px;font-size:12px;vertical-align:baseline;background:none;float:none;height:auto;line-height:1.1em;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;min-height:auto;"> 
    <div style="margin-left:-10px;width:640px;border:0px;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;min-height:auto;"> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">public</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">static</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">void</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">main(String[] args) </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">throws</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">IOException, ClassNotFoundException { </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">List&lt;String&gt; stringList = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ArrayList&lt;String&gt;();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">stringList.add(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"hello"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">stringList.add(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"world"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">stringList.add(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"hollis"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">stringList.add(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"chuang"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">System.out.println(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"init StringList"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ stringList);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectOutputStream objectOutputStream = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectOutputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">FileOutputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"stringlist"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">));</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">objectOutputStream.writeObject(stringList);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;">
       &nbsp; 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">IOUtils.close(objectOutputStream);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">File file = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">File(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"stringlist"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectInputStream objectInputStream = </code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">ObjectInputStream(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">new</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">FileInputStream(file));</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">List&lt;String&gt; newStringList = (List&lt;String&gt;)objectInputStream.readObject();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">IOUtils.close(objectInputStream);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;font-weight:bold;min-height:auto;color:rgb(0,102,153);">if</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">(file.exists()){ </code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">file.delete();</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">System.out.println(</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#0000FF;">"new StringList"</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">+ newStringList);</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;">&nbsp;&nbsp;&nbsp;&nbsp;</code> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:#000000;">}</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//init StringList[hello, world, hollis, chuang]</code> 
     </div> 
     <div style="border:0px;margin:0px;padding:0px 1em;background-image:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;white-space:pre;"> 
      <code style="border:0px;margin:0px;padding:0px;font-family:Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;background:none;float:none;height:auto;line-height:1.1em;vertical-align:baseline;width:auto;min-height:auto;color:rgb(0,130,0);">//new StringList[hello, world, hollis, chuang]</code> 
     </div> 
    </div></td> 
  </tr> 
 </tbody> 
</table>

了解ArrayList的人都知道，ArrayList底层是通过数组实现的。那么数组`elementData`其实就是用来保存列表中的元素的。通过该属性的声明方式我们知道，他是无法通过序列化持久化下来的。那么为什么code 4的结果却通过序列化和反序列化把List中的元素保留下来了呢？

### writeObject和readObject方法 ###

在ArrayList中定义了来个方法：`writeObject`和`readObject`。

这里先给出结论:

> 在序列化过程中，如果被序列化的类中定义了writeObject 和 readObject 方法，虚拟机会试图调用对象类里的 writeObject 和 readObject 方法，进行用户自定义的序列化和反序列化。
> 
> 如果没有这样的方法，则默认调用是 ObjectOutputStream 的 defaultWriteObject 方法以及 ObjectInputStream 的 defaultReadObject 方法。
> 
> 用户自定义的 writeObject 和 readObject 方法可以允许用户控制序列化的过程，比如可以在序列化的过程中动态改变序列化的数值。

来看一下这两个方法的具体实现：

code 5

code 6

那么为什么ArrayList要用这种方式来实现序列化呢？

### why transient ###

ArrayList实际上是动态数组，每次在放满以后自动增长设定的长度值，如果数组自动增长长度设为100，而实际只放了一个元素，那就会序列化99个null元素。为了保证在序列化的时候不会将这么多null同时进行序列化，ArrayList把元素数组设置为transient。

### why writeObject and readObject ###

前面说过，为了防止一个包含大量空对象的数组被序列化，为了优化存储，所以，ArrayList使用`transient`来声明`elementData`。 但是，作为一个集合，在序列化过程中还必须保证其中的元素可以被持久化下来，所以，通过重写`writeObject` 和 `readObject`方法的方式把其中的元素保留下来。

`writeObject`方法把`elementData`数组中的元素遍历的保存到输出流（ObjectOutputStream）中。

`readObject`方法从输入流（ObjectInputStream）中读出对象并保存赋值到`elementData`数组中。

至此，我们先试着来回答刚刚提出的问题：

> 如何自定义的序列化和反序列化策略

答：可以通过在被序列化的类中增加writeObject 和 readObject方法。那么问题又来了：

> 虽然ArrayList中写了writeObject 和 readObject 方法，但是这两个方法并没有显示的被调用啊。
> 
> 那么如果一个类中包含writeObject 和 readObject 方法，那么这两个方法是怎么被调用的呢?

## ObjectOutputStream ##

从code 4中，我们可以看出，对象的序列化过程通过ObjectOutputStream和ObjectInputputStream来实现的，那么带着刚刚的问题，我们来分析一下ArrayList中的writeObject 和 readObject 方法到底是如何被调用的呢？

为了节省篇幅，这里给出ObjectOutputStream的writeObject的调用栈：

`writeObject ---> writeObject0 --->writeOrdinaryObject--->writeSerialData--->invokeWriteObject`

这里看一下invokeWriteObject：

其中`writeObjectMethod.invoke(obj, new Object[]{ out });`是关键，通过反射的方式调用writeObjectMethod方法。官方是这么解释这个writeObjectMethod的：