-----2012.04.03 Update-------------------------------------------------------------
由於最近canonical remove all Sun JDK packages from the Partner archive.
所以只能透過PPA來install sun java 6
sudo apt-add-repository ppa:flexiondotorg/java
sudo apt-get update
sudo apt-get install sun-java6-jdk sun-java6-plugin
sudo update-java-alternatives -s java-6-sun
Reference：
