2. Eclipse install and usage

JDK：

1. Download and install JDK: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
2. Set system ENV:
   • JAVA_HOME：D:\Java\jdk1.8.0_25
   • CLASSPATH  ：.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;
   • path：;%JAVA_HOME%\bin;%JAVA_HOME%\jre\bin
3. The way to find java home in command: 
   • echo %java_home%
   • 如果不生效，则关掉原有的cmd窗口，用管理员身份运行，重新读取一下变量路径就好了

Maven：

1. Download maven package：https://www.cnblogs.com/liuhongfeng/p/5057827.html （apache-maven-3.6.0-bin.zip）
2. unzip this package ,then add ENV path:
   • MAVEN_HOME: C:\Program Files\apache-maven-3.6.0
   • path: C:\Program Files\apache-maven-3.6.0\bin

Eclipse with java debug env build:

1. Get eclipse zip package:  https://www.eclipse.org/downloads/packages/ 
2. install git plugin & install git software。
3. eclipse-windows-conference-maven-installations, add mvn home path, then apply this config.

Test

1. Go to suorce path: run "mvn install"