How to install Oracle JDK on Ubuntu from repository

This package provides Oracle Java JDK 7 (which includes Java JDK, JRE and the Java browser plugin). However, you can't only install Oracle JRE - the PPA only provides the full Oracle JDK7 package.

To install:
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-jdk7-installer

And to uninstall:
sudo apt-get remove oracle-jdk7-installer

And to verify your installation:
java -version
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 22.0-b10, mixed mode)

And to verify the web browser installation:
http://java.com/en/download/installed.jsp
Verified Java Version
Congratulations!
You have the recommended Java installed (1.7.0_51).

And to update:
If for some reason, the Java version in use is not 1.7.0, you can try to run the following command:

sudo update-java-alternatives -s java-7-oracle

To Install and Set in environment variable:
To automatically set up the Java 7 environment variables, you can install the following package:

sudo apt-get install oracle-jdk7-set-default

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