Install JDK6 for Ubuntu 12.04 (32bit & 64bit)

Install Oracle JDK 6 for Ubuntu 12.04 (32bit & 64bit)

$ sudo add-apt-repository ppa:webupd8team/java

$ sudo apt-get update

$ sudo apt-get install oracle-java6-installer (oracle-java7-installer)

Config Setting

$ sudo update-alternatives --config java