Having problem with Java Communication API

Question

I am using this code to list the port that i have but it does not return any thing. when i compile and run nothing is printed out. i think either its not going in while loop but if i remove while loop it returns NULL. so i think its not recognizing any PORTS. i want to detect a modem port as i want to make a voice mail software. I am jsut starting by listing, opening and listening to the ports. Please help me ASAP. Thank you.
import javax.comm.*;
import java.util.*;
public class PortLister {
public static void main(String[] args) {
Enumeration e = CommPortIdentifier.getPortIdentifiers();
while (e.hasMoreElements()) {
System.out.println((CommPortIdentifier) e.nextElement());
}

Answer 1

Go back where you downloaded the API and read the FAQ. I think it's the question number 2.