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.