JDK1.8安装、配置、注意事项及示例

朱雀 2023-06-23 09:59 103阅读 0赞

### 文章目录 ###

*   *   *  下载JDK
         *  安装
         *   *  配置环境变量
             *  验证
         *  示例
         *   *  下载jdk1.8
             *  新建JAVA\_HOME(变量值为安装路径)
             *  Path配置
         *  安装成功

### 下载JDK ###

Java 8 (又称为 jdk 1.8) 是 Java 语言开发的一个主要版本。 Oracle 公司于 2014 年 3 月 18 日发布 Java 8 ，它支持函数式编程，新的 JavaScript 引擎，新的日期 API，新的Stream API 等。

网址：[https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html][https_www.oracle.com_technetwork_java_javase_downloads_jdk8-downloads-2133151.html]

![jdk下载][jdk]  
根据自己系统的版本位数下载对应版本的jdk即可

### 安装 ###

双击安装包安装 jdk,一直 next 就没错

#### 配置环境变量 ####

1.  Win+E 打开此电脑 右键点击此电脑 点击属性
    
    ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center][]
2.  打开高级系统设置  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 1]
3.  打开环境变量  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 2]
4.  配置JAVA\_HOME  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 3]
5.  新建JAVA\_HOME 值为jdk安装路径
6.  (JDK版本1.6以后无需配置)配置CLASSPATH 值为%JAVA\_HOME%\\lib;%JAVA\_HOME%\\lib\\tools.jar
7.  新建Path  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 4]

#### 验证 ####

Windows+R后输入cmd回车  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 5]

输入：java -version  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 6]  
环境变量配置成功

### 示例 ###

#### 下载jdk1.8 ####

可在 [https://download.csdn.net/download/qq\_42542620/12038321][https_download.csdn.net_download_qq_42542620_12038321] 下载jdk1.8，安全免费。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 8]

#### 新建JAVA\_HOME(变量值为安装路径) ####

![在这里插入图片描述][20200902113337499.png_pic_center]

#### Path配置 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 9]

### 安装成功 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw_size_16_color_FFFFFF_t_70_pic_center 10]

[https_www.oracle.com_technetwork_java_javase_downloads_jdk8-downloads-2133151.html]: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
[jdk]: https://img-blog.csdnimg.cn/20200902113012446.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNTQyNjIw,size_16,color_FFFFFF,t_70#pic_center
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[https_download.csdn.net_download_qq_42542620_12038321]: https://download.csdn.net/download/qq_42542620/12038321
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