Installing Java 7 Update 25 on 12.04 LTS?

• Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
• Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

To install the latest version of Oracle Java (the latest posted in the Oracle webpage), the easiest way is to use the Java Installer (as flashplugin-installer does) as here is explained:http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html

Oracle JDK7 itself is not hosted in the PPA because that's not allowed by the new Java license (which is also the reason why it has been removed from the official Ubuntu repositories); the package in the PPA automatically downloads (and installs) Oracle Java JDK 7 from its official website and installs it on your computer, just like the flashplugin-installer package does.

Then, you have to do only this:

sudo add-apt-repository ppa:webupd8team/javasudo apt-get updatesudo apt-get install oracle-java7-installer

And type this to check the version:

java -version

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