[mac java 环境搭建]2019-04-04

1-查看当前本机JVM版本：

/usr/libexec/java_home -V

2- 安装jdk1.7
  https://developer.oracle.com/java
  傻瓜安装即可；

3-res

装好1.7

4-装idea
  装社区版；配置jdk1.7;运行示例会出现：

objc[73488]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.

的错误；原因以及解决：
https://blog.csdn.net/lizhaowei213/article/details/68951671