#!/bin/sh

 # usage: . this_file [argvs]

 openjdk7_home=/usr/lib/jvm/java-1.7.-openjdk-i386

 jdk8_home=/usr/lib/jvm/jdk1..0_102

 case $ in

     jdk6 )

         export JAVA_HOME=$jdk6_home

         ;;

     openjdk7 )

         export JAVA_HOME=$openjdk7_home

         ;;

     jdk8 )

         export JAVA_HOME=$jdk8_home

         ;;

     * )

         echo usage: . this_file [argument]

         echo argument is one of [ jdk6, openjdk7 , jdk8 ].

         ;;

 esac

 export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:.

 export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

$chmod +x jdkswitch.sh

$. jdkswitch.sh openjdk7