Install oracle java 7 in ubuntu 12.04

Open the terminal and run the following commands:

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

You can check the java version by searching java in dashboard.

jkd-7u5-linux-i586

From: How to install oracle java 7 in ubuntu 12.04