How to install Oracle JDK 7 in Ubuntu Server 12.04 via apt-get command line?

# Step 1: Add the repository for JDK 7.
sudo apt-add-repository ppa:webupd8team/java

# Step 2: Update
sudo apt-get update

# Step 3: Install JDK and associated utilities
sudo apt-get install oracle-java7-installer

# Step 4: Set the default java interpreter used by the system.
sudo update-alternatives --config java

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References:

• Ubuntu forums: http://ubuntuforums.org/showthread.php?t=1969338
• Ubuntu Community: https://help.ubuntu.com/community/Java
• Oracle (Sun) Java JRE for Ubuntu, Linux Mint and Debian: https://sites.google.com/site/easylinuxtipsproject/java#TOC-How-to-for-Oracle-Sun-Java-JRE
• Ubuntu 12.04 – install sun jdk 6-7: http://www.devsniper.com/ubuntu-12-04-install-sun-jdk-6-7
  
• Ask Ubuntu: http://askubuntu.com/questions/121654/how-to-set-default-java-version

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