====== Update the Java runtime version on Mac OS X ======

  - http://mikemainguy.blogspot.sg/2014/11/easily-changing-java-versions-in-osx.html


  sudo vim /etc/bashrc
  
<code BASH>
jvm() {
  export JAVA_HOME=`/usr/libexec/java_home -v "$1"`
  java -version
}

jvm 1.7
</code>