Ubuntu 12.04.4 LTS Installing JDK 7

http://askubuntu.com/questions/183867/how-do-i-update-oracle-java-7-jdk-and-jre

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

sud 

sudo update-java-alternatives -s java-7-oracle