How to set alternative java : set default java to use in linux

Start terminal (ctrl+alt+t) and type the following command :



sudo update-alternatives --config java


This will print option as follows :



  Selection    Path                                      Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-6-openjdk/jre/bin/java   1061      auto mode
  1            /usr/lib/jvm/java-6-openjdk/jre/bin/java   1061      manual mode
  2            /usr/lib/jvm/java-6-sun/jre/bin/java       63        manual mode

Press enter to keep the current choice[*], or type selection number: 2

And here you can select option giving 0/1/2 to set the default java to use. :) cheer :)