Oh, and NXT is written in Java!!! WTF?
You keep saying it is written in Java, and I think you mean it as a negative but you don't define clearly in what way it is a negative.
Java requires a virtual machine. It does not run natively.
Someone above spoke of a "Raspberry Pi" - that's an advanced machine.
But hey, if Java is the language they chose; best of luck to them (whoever they are) in their endeavours.