Suggestion on packages to use when connecting java with wireless real life objects

[Addez]

Hi.
Im thinking of making a rc-computer controlled submarine as a senior project.
Mainly because I would like to make a cool radar interface and be able to controll
the whole thing from a laptop.

Problem is, I'm not sure on how to connect the two objects..
Bluetooth might work but would not be so fast..
I'v tried before to install some java-usb thing, It took ages and never worked.

Any suggestion on what to use?
I have an arduino but it doesnt support bluetooth..



To state my question clear:
What is the cheapest and easiest way to make a java program recive and send
information to another device which can preform tasks (like turn a servo etc)?

[Toll]

The easiest would probably be to use a WLAN on the sub and just use the standard network objects. Just make sure the transmission is actually able to go through water.