I had spent a lot of time setting the $PATH on my Ubuntu but i forgot to document the procedure. So when my friend asked me, i wasn’t able to help him out. So this time i asked him to tell the solution so that i could note it down. The best place would be my blog.
JAVA_HOME=/usr/lib/jvm/java export JAVA_HOME PATH=$PATH:$JAVA_HOME/bin export PATH
Source: The Ubuntu Guy.