JDK的下载安装和环境变量的配置

阳光穿透心脏的1/2处 2024-04-18 10:56 71阅读 0赞

# **一、下载JDK** #

**下载地址：**[http://www.oracle.com/technetwork/java/javase/downloads/index.html][http_www.oracle.com_technetwork_java_javase_downloads_index.html]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 1][]

# 二、安装JDK #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 2][]

安装路径可以自己选择，我选的是D盘，选择好路径后按“下一步”

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 3][]

出现这个界面就安装完成了，点击关闭即可

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 4][]

# 三、配置环境变量 #

**注意：**如果使用 1.5 以上版本的 JDK，不用设置 CLASSPATH 环境变量，也可以正常编译和运行 Java 程序。

1.复制JDK安装地址

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 5][]

2.右键“此电脑”，点击“属性”，选择“高级系统设置”来到下图位置，然后点击“环境变量”

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 6][]

3.新建一个系统变量“JAVA\_HOME”将JDK安装路径（刚才复制的路径）复制进去，保存

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 7][]

4.双击打开“path”变量，添加JDK的bin路径（D:\\Program Files\\Java\\jdk-12.0.2\\bin）并保存

**注意：**%JAVA\_HOME%表示JAVA\_HOME里面的路径，建议用此格式

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 9][]

# 四、测试是否配置成功 #

1、"开始"->"运行"，输入"cmd"；

2、键入命令: **java -version**、**java**、**javac** 几个命令，出现类似以下信息，说明环境变量配置成功；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NTg4MDAz_size_16_color_FFFFFF_t_70 10][]

[http_www.oracle.com_technetwork_java_javase_downloads_index.html]: http://www.oracle.com/technetwork/java/javase/downloads/index.html
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