Install Java on Debian based Linux such as Ubuntu, Linux Mint etc ...

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First you need to remove openjdk 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 oracle java 7 in ubuntu 13.04/12.10/12.04
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

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