The Android OS definitely needs no introduction: it powers over 80% of all smart phones in the world right now.

Tutorials and how-tos for your computer
The Android OS definitely needs no introduction: it powers over 80% of all smart phones in the world right now.
Do you need Oracle Java on your Ubuntu computer? This is the tutorial you need. It will also show you how to uninstall OpenJDK from your computer if you had it before.