1. JDK download address:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
Scroll to the bottom of the page and click
You can choose different versions of jdk to download
2. Installation of jdk
Right-click on the My Computer icon and select Properties to configure environment variables
22, jdk 32 right click
Path: %JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;
CLASSPATH ：.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar 注意'.;'
JAVA_HOME