How to install Java 7 in Ubuntu

Java is a programming language and computing platform first released by Sun Microsystems in 1995. It is the underlying technology that powers state-of-the-art programs including utilities, games, and business applications. Java runs on more than 850 million personal computers worldwide, and on billions of devices worldwide, including mobile and TV devices.





Ubuntu is Fast, secure and stylishly simple, the Ubuntu operating system is used by 20 million people worldwide every day.









Prepare your Ubuntu

First you need to remove previous openjdk  version from your system, for this run the following command from your terminal

sudo apt-get purge openjdk*

If you installed java 7 from any other PPA and you are having problem with java then you have to do following steps before installing the PPA menctioned here

sudo rm /var/lib/dpkg/info/oracle-java7-installer*
sudo apt-get purge oracle-java7-installer*
sudo rm /etc/apt/sources.list.d/*java*
sudo apt-get update

Install 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 

Enjoy Coding ....... :)
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