How to get MAC address in Java before JDK 1.6

package org.best.example;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class app{

   public static void main(String[] args) throws IOException{

       String command = "ipconfig /all";
       Process p = Runtime.getRuntime().exec(command);

       BufferedReader inn = new BufferedReader(new InputStreamReader(p.getInputStream()));
       Pattern pattern = Pattern.compile(".*Physical Addres.*: (.*)");

       while (true) {
            String line = inn.readLine();

        if (line == null)
            break;

        Matcher mm = pattern.matcher(line);
        if (mm.matches()) {
            System.out.println(mm.group(1));
        }
    }       
   }
}