安装JDK

1.下载JDK

http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html

2.安装JDK

c:\java\

3.设置系统环境变量

JAVA_HOME c:\Java\jdkx.x.x

Path 增加 %JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;

CLASS_PATH .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar

4.检测

运行cmd

java -version