Find and set $JAVA_HOME on MAC

1. JAVA_HOME can be located using the tool command "/usr/libexec/java_home":

    

   Targeting JAVA:

   /usr/libexec/java_home -V Matching Java Virtual Machines (1): 1.8.0_25, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home /Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home

    

   Alternatively use the -V option to list all versions of JAVA_HOME:

   $ /usr/libexec/java_home -V

   Matching Java Virtual Machines (3): 1.7.0_45, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_45.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 /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home

    

   Placement JAVA_HOME:

   $ cat ~/.profile

   JAVA_HOME=`/usr/libexec/java_home`

   export JAVA_HOME

   $ echo $JAVA_HOME /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home

   $ source ~/.profile $java

    

   JAVA_HOME=$(/usr/libexec/java_home-v1.7)  

    

   export JAVA_HOME