Install Java 7 in Ubuntu 12.04 (Precise Pangolin)
To install java in Ubuntu 12.04 open terminal and write following commands
1. Add a WEBUPD8 repository
$ sudo add-apt-repository ppa:webupd8team/java
2. Update the repository
$ sudo apt-get update
3. Install Oracle java
$ sudo apt-get install oracle-java7-installer
That's it you have successfully installed java .
To uninstall java type following command
$ sudo apt-get remove oracle-java7-installer
