getting mac address through aglet

import java.io.*;
import java.net.*;
import java.util.*;
import java.util.regex.*;
import com.ibm.aglet.*;

public class GetMac extends Aglet
{

public String getMacAddress()
       {
         String macAddress = null;
         try{
         String command = "ipconfig /all";
         Process pid = Runtime.getRuntime().exec(command);
         BufferedReader in =new BufferedReader(new InputStreamReader
(pid.getInputStream()));
        while (true) {
           String line = in.readLine();
            if (line == null)
            break;
            Pattern p = Pattern.compile(".*Physical Address.*: (.*)");
            Matcher m = p.matcher(line);
            if (m.matches()) {
            macAddress = m.group(1);
            break;
                                      }
                           }
            in.close();}
             catch(Exception e)
       {System.out.println(e);}
        return macAddress;

         }

public void run() {
    String address = new GetMac().getMacAddress();
    System.out.println(address);
    setText(address);
                          }
}

well,this is my code for retrieving the mac address thru aglet2.0.2 .
But the solution is not coming properly....
please suggest a proper way to retieve the mac address thru
aglet2.0.2.......