$java -version
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)</p> <p># 查看系統安裝的java版本
$/usr/libexec/java_home -V
Matching Java Virtual Machines (3):
1.7.0_60, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home
1.6.0_65-b14-462, x86_64: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
1.6.0_65-b14-462, i386: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home</p> <p># 返回系統安裝的java最高版本
$/usr/libexec/java_home
/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home
