how to get processing on Linux to communicate via rfcomm

Hi,

I'm looking for a way to get a Processing script to read and write on /dev/rfcomm port (bluetooth). It is simply a serial protocol but the following code fails:

1. import processing.serial.*;
2. Serial myPort; 
3. void setup() {
4.   println(Serial.list());  // this returns nothing
   
5.   String portName = "/dev/rfcomm0";
6.   myPort = new Serial(this, portName, 9600);  // this causes a null pointer exception
   
7.   println(myPort);
8.     myPort.write('x');
9. }

I can connect to /dev/rfcomm0 via PuTTY and communicate with no problem...

Any ideas would be great!
Thanks,
Bob