Listing Comm ports on WinXP SP2

Hi,

I have the following code from the book Java I/O:

import javax.comm.*;
public class NamedPortLister {
  public static void main(String[] args) {
    // List serial (COM) ports.
    try {
      int portNumber = 1;
      while (true) {
        CommPortIdentifier.getPortIdentifier("COM" + portNumber);
        System.out.println("COM" + portNumber);
        portNumber++;
      }

    }
    catch (NoSuchPortException ex) {
      // Break out of loop.
    }
    // List parallel (LPT) ports.
    try {
      int portNumber = 1;
      while (true) {
        CommPortIdentifier.getPortIdentifier("LPT" + portNumber);
        System.out.println("LPT" + portNumber);
        portNumber++;
      }
    }
    catch (NoSuchPortException ex) {
      // Break out of loop.
    }
  }
}

I have tried Netbeans & the command line. Both compile and *seem* to run, however there is no output??
Running WinXp SP2
Java Comm 2.0
JDK 1.5.07

Cheers,
Craig