Set Sun/Oracle JDK as default

Per default Ubuntu comes with OpenJDK. I want to use the Sun/Oracle JDK.

check default JDK:

$ java -version
java version "1.6.0_22"

OpenJDK Runtime Environment (IcedTea6 1.10.2) (6b22-1.10.2-0ubuntu1~11.04.1)
OpenJDK Server VM (build 20.0-b11, mixed mode)

set Sun/Oracle JDK as default JDK:

$ sudo update-alternatives --config java

* 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

Asterisk shows the chosen JDK.
check:

$ java -version

java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) Server VM (build 19.1-b02, mixed mode)