If you have more javas and you want to switch between the javas, you can select a java from the javas with this...

jhome.fish

function jhome
	set -x JAVA_HOME (/usr/libexec/java_home $argv)
  echo "JAVA_HOME:" $JAVA_HOME
  echo "java -version:"
  java -version
end

jhome.gif

This little ditty uses sets the java_home based on /usr/libexec/java_home to the local shell.

Usage:

set JAVA_HOME to latest java

jhome 

set JAVA_HOME to a certain java version

jhome -v 1.7

See: https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/java_home.1.html