Oracle Java 7

1. Add PPA and install Java

sudo add-apt-repository ppa:webupd8team/java

If this command gives you an error then the solution is to install the python-software-properties package:

$ sudo apt-get install python-software-properties

sudo apt-get update && sudo apt-get install oracle-jdk7-installer

2. Enable Java

update-alternatives –display java

3. Check installation

java -version

4.  Adding JAVA_HOME to environment

Edit /etc/environment and add JAVA_HOME=/usr/lib/jvm/java-7-oracle to the end of the file.
sudo nano /etc/environment

Append to the end of the file:
JAVA_HOME=/usr/lib/jvm/java-7-oracle

Sun Java 6

sudo apt-get install python-software-properties

sudo add-apt-repository “deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main”
sudo apt-get update
sudo apt-get install sun-java5-jdk sun-java6-jdk 

By admin