Changing default Java in Ubuntu

Just perform these steps to change the default Java in Ubuntu. I have been using the absolute path all these days...... but now I need not do that anymore :)
1. Check the current version of Java using the command

java -version

This may result in some output of the form.
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)

2. Check the available Java installed in your system.

update-java-alternatives -l

java-6-sun 63 /usr/lib/jvm/java-6-sun
java-gcj 1042 /usr/lib/jvm/java-gcj


3. Now select the Java version you want as default.

update-alternatives --config java
There are 4 alternatives which provide `java'.

Selection Alternative
-----------------------------------------------
1 /usr/bin/gij-4.2
+ 2 /usr/lib/jvm/java-gcj/jre/bin/java
* 3 /usr/lib/jvm/java-6-sun/jre/bin/java
4 /usr/bin/gij-4.1

4. Enter you Java selection number.

Thats it! You are done.........
Now check the new default java using

java -version