- Download the new JDK
- Extract it and move it to /usr/lib/jvm. Here you can find all versions of java that you have
- Now we use a script to change the default java version [0.5 is not the java version]
wget http://webupd8.googlecode.com/files/update-java-0.5b
chmod +x update-java-0.5b
sudo ./update-java-0.5b 