function to switch java version

change-java.sh

function changeJava
{
	declare -A versions
		versions[java6oracle]=aaaaa
		versions[java6oracle-short]=6c
		versions[java7open]=java-7-openjdk
		versions[java7open-short]=7o

	#symbolic link to correct version
	for i in {'',c,p,doc,h}; do
		sudo ln -sf /usr/bin/java$i /usr/lib/jvm/${versions[$1]}/bin/java$i
	done

	#exporting java version
	export JAVA_VERSION_SHORT_NAME=\[${versions[$1-short]}\]
	export JAVA_HOME=/usr/lib/jvm/${versions[$1]}
}

#zsh completion
compctl -k "(java6oracle java7open)" changeJava