http://www.wikihow.com/Install-Java-on-Linux

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Manual Non-RPM Method

This is the generic method that also works with GNU/Linux clones that do not support RPM. It does not require administrator rights and allows installing multiple Java versions on the same computer.

1. 1
   1. Download the JDK.^[1].

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   • Click on the "Download" link under Java Platform (JDK) 7u4.
   • Accept the license and continue.
2. 2
   Select the right download. Under the "Product/File Description" you should pick your corresponding Linux option. For example, if you're running Linux x86 (32-bit), you need to choose the corresponding “*.tar.gz” version.
   
   
   
3. 3
   Download the file as a .gz. Save it to your GNU/Linux machine.