JAVA_HOME setting (Mac OSX 10.5 or later)

JAVA_HOME

$ vim .bash_profile 
 
export JAVA_HOME=$(/usr/libexec/java_home)
 
$ source .bash_profile
 
$ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home

$ /usr/libexec/java_home -V
Matching Java Virtual Machines (3):
    1.7.0_05, x86_64:	"Java SE 7"	/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
    1.6.0_41-b02-445, x86_64:	"Java SE 6"	/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
    1.6.0_41-b02-445, i386:	"Java SE 6"	/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
    
##return top Java version
$ /usr/libexec/java_home
/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home
 
## I want Java version 1.6
$ /usr/libexec/java_home -v 1.6
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home


## http://www.mkyong.com/java/how-to-set-java_home-environment-variable-on-mac-os-x/