Functions to switch JVM (Java) versions on OSX

java_home.zsh

#functions placed in /etc/zshenv
alias java_ls='/usr/libexec/java_home -V 2>&1 | grep -E "\d.\d.(\d_\d\d|\d)" | cut -d , -f 1 | colrm 1 4 | grep -v Home'
alias java_home='/usr/libexec/java_home'

function java_use() {
	removeFromPath $(/usr/libexec/java_home)/bin
    export JAVA_HOME=$(/usr/libexec/java_home -v $1)
    export PATH=$JAVA_HOME/bin:$PATH
    java -version
}

function removeFromPath() {
	export PATH=$(echo $PATH | sed -E -e "s;:$1;;" -e "s;$1:?;;")
}

#Usage 
#java_ls
#java_use 1.7
#java_use 1.8