Sun/Oracle Java under Ubuntu
If you want to use the official Oracle Java Version you need to either install it manually or use an unofficial ppa. This is because Ubuntu removed the Oracle/Sun Java from the
official repositories. In order to use the ppa you need to issue the following commands:
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
This will download the official version and install it.