Update Java 1.6 to 1.7 in Ubuntu

Open Terminal and run the following commands;-

• sudo apt-get install python-software-properties
• sudo apt-add-repository ppa:openjdk/ppa
• sudo apt-get update
• sudo apt-get install openjdk-7-jdk
• sudo update-alternatives --config java (Type the Version number and press Enter)
• sudo java -version