Hi Andio,
Unfortunatelly the BenQ T80 does not have JSR-82.
http://www.cell-idea.com:8080/Virtual_Shop/benqT80.jspI can give you a small clue about how I solved this. I hope it will help: you can create a Bluetooth router in C/C++ and make it listening for localhost connections. So in the Java application, you can open a socket connection with your Bluetooth server.
Cheers!
Jose