java jdk7和jdk8在mac os上的版本切換

1) Install all of them, 1.6, 1.7, 1.8 in any order. I believe the last one installed determines which one will be used for browser plugins, I'm not going to care about changing those below.

2) Then, add to your bashrc or wherever:

export JAVA_HOME=$(/usr/libexec/java_home -v 1.7)     setjdk() {       export JAVA_HOME=$(/usr/libexec/java_home -v $1)     }      

Now you can:

$ java -version     java version "1.7.0_51"     Java(TM) SE Runtime Environment (build 1.7.0_51-b13)     Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)     $ setjdk 1.6     $ java -version     java version "1.6.0_65"     Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)     Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)     $ setjdk 1.8     $ java -version     java version "1.8.0"     Java(TM) SE Runtime Environment (build 1.8.0-b132)     Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)