MAC JAVA 环境变量那些事

1,查看 JAVA 的版本号 

akdeMacBook-Pro:bin AK$ java -version

java version "1.6.0_65"

Java(TM) SE Runtime Environment (build 1.6.0_65-b14-466.1-11M4716)

Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-466.1, mixed mode)

2，切换不同 JAVA 版本号

 1）cd /usr/bin/

 2）ls -l java

    lrwxr-xr-x  1 root  wheel  74  3 13 11:47 java ->                /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java