Minecraft /Ubuntu - Black screen on launch

Issue

I've successfully installed Minecraft under Ubuntu, but my provlem is that upon launch, all I get is a black screen.

Solution

Configure Java (Minecraft isn't compatible with version 7- switch to version 6):

• Open a terminal and type:

• sudo update-alternatives --config java 

• Open Minecraft.jar (either via the command: java -jar /path_to_minecraft/minecraft.jar) or either by right-clicking on minecraft.jar > JDKjava6Runtime.