JAVA_HOME Command Tool for OS X

# List installed Java
$/usr/libexec/java_home -verbose

Matching Java Virtual Machines (3):
  1.8.0_05, x86_64:  "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home
  1.6.0_65-b14-466.1, x86_64: "Java SE 6" /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
  1.6.0_65-b14-466.1, i386: "Java SE 6"   /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home


# Get Current Java  Home
$/usr/libexec/java_home

/Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home


# Get path to 1.6 (if installed)
$/usr/libexec/java_home v1.6

/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home