The newest versions of the JDK and JRE are no longer in the official repositories and require a manual installation to get them to work. This guide demonstrates the steps required in order to install the JDK and JRE, version 7, on an Ubuntu or Ubuntu based system.
This guide is not to be confused with OpenJDK, a 100% open-source implementation of the Java language. The JDK offered by Oracle has a few binaries which could not be released under an open-source license and is required for the development of many Java applications.
