HOW TO INSTALL SUN(ORACLE) JAVA ON UBUNTU 12.04 IN 3 EASY STEPS

If you have upgraded to Ubuntu 12.04 or just made a fresh Ubuntu installation you might want to install sun(oracle) java on it. Although Ubuntu has its own jdk, the OpenJdk, but there certain things that demand for sun(oracle) java. You can follow the steps shown below to do that -

1 - Add the “WEBUPD8″ PPA :

    hadoop@master:~$ sudo add-apt-repository ppa:webupd8team/java 

2 - Update the repositories :

     hadoop@master:~$ sudo apt-get update

3 - Begin the installation :

     hadoop@master:~$ sudo apt-get install oracle-java7-installer

Now, to test if the installation was ok or not do this :

hadoop@master:~$ java -version

If everything was ok you must be able to see something like this on your terminal :

hadoop@master:~$ java -version

java version "1.7.0_05"

Java(TM) SE Runtime Environment (build 1.7.0_05-b05)

Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode)

hadoop@master:~$