set-java(1) for OS X

set-java

#!/bin/bash
# Set the current version of Java being used.
# Doesn't at the moment set the path as the mac just pulls them from JAVA_HOME

# Get the current
current=$JAVA_HOME

# Look for the default
default=$(/usr/libexec/java_home)

# Get a list of all the options
# Output is path:name:version
options=$(/usr/libexec/java_home -V 2>&1 | grep '^ '  | while read line; do path=$(echo ${line##* }); name=$(echo ${line% *}); echo -e "${name}:${path}"; done | sort -n)

echo "$options" | while read line
do
	name=$(echo $line| cut -d: -f1)
	path=$(echo $line| cut -d: -f2| tr -d '"')
	if [ "$path" == "$current" ]; then
		name="${name} (*)"
	fi
	echo -e "$name\t( $path )"
done | cat -n 1>&2
echo -n "Select your JDK: " 1>&2
read line

if [ -n "$line" ]; then
    # Return the selected path on stdout
    echo "$options" | cut -d: -f2| sed -n "${line}p"
else 
    echo "$current"
fi

To use this with bash set the alias:

alias set-java='export JAVA_HOME=$(/Users/buckett/bin/set-java)'