1、下载java环境 JDK
https://www.oracle.com/technetwork/java/javase/downloads/index.html
2、配置环境变量
JAVA_HOME : java的安装目录 (例:C:Program FilesJavajdk-12.0.1)
PATH : java目录中bin的安装目录 (例:C:Program FilesJavajdk-12.0.1in)
CLASSPATH : java目录中lib的安装目录 (例:C:Program FilesJavajdk-12.0.1lib)
3、安装eclipse 开发工具 (汉化)