Java 7

How to install Eclipse 4.3 Kepler or Eclipse 4.2 Juno and pre-requisite Oracle Java 7 on Ubuntu 13.04 Raring / Ubuntu 12.04 Precise LTS / Linux Mint 15 Olivia (the recommended method)

Eclipse is one of the most widely used free and open-source IDEs out there in the professional Software Development industry.
Still, both Ubuntu 13.04 Raring (as well as the LST Ubuntu 12.04.x) and Linux Mint 15 Olivia has a seemingly very old version of Eclipse in their repositories.
Here is a how-to on installing the latest and greatest version of Eclipse 4.3 Kepler (this whould also work for Eclipse 4.2 Juno) on Ubuntu 13.04 Raring / Ubuntu 12.04 Precise / Linux Mint 15 Olivia:

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