[APPLET] - Pegando Mac em Win 7

Front-end
#1

Nao tenho certeza se esta na area certa, mas…

Estou procurando uma forma de Pegar o Mac e o nome da maquina do cliente que esta acessando o applet, o codigo funciona em win xp, mas nao funciona em win 7, existe alguma forma de encontrar no win 7 ?

Aguardo, obrigado dês de já a todos.

Seque a classe completa :

package userData;
import java.io.*;
import java.net.*;
import java.util.Enumeration;
 

public class GetUserData {
 
    static final byte[] HEX_CHAR_TABLE = {
        (byte) '0', (byte) '1', (byte) '2', (byte) '3',
        (byte) '4', (byte) '5', (byte) '6', (byte) '7',
        (byte) '8', (byte) '9', (byte) 'A', (byte) 'B',
        (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F'
    };
 
    public String getMac() throws MacAddressException {
 
        Enumeration<NetworkInterface> infoNetInterface = null;
        try {
            infoNetInterface = NetworkInterface.getNetworkInterfaces();
           
        } catch (SocketException ex) {
            throw new MacAddressException();
 
        }
 
        while (infoNetInterface.hasMoreElements()) {
            NetworkInterface macaddress;
            macaddress = infoNetInterface.nextElement();
          
            try {
                if (macaddress != null && macaddress.getHardwareAddress() != null) {
                    String mac = new String(macaddress.getHardwareAddress());
 
                    if (mac != null) {
 
                        return getHexString(macaddress.getHardwareAddress());
                    }
                }
            } catch (UnsupportedEncodingException ex) {
                throw new MacAddressException();
 
            } catch (SocketException ex) {
                throw new MacAddressException();
 
            }
        }
 
        return null;
    }
 
    public String getHexString(byte[] mac)
            throws UnsupportedEncodingException {
        byte[] macnum = new byte[2 * mac.length + 5];
        int index = 0;
 
        for (byte b : mac) {
            int v = b & 0xFF;
            macnum[index++] = HEX_CHAR_TABLE[v >>> 4];
            macnum[index++] = HEX_CHAR_TABLE[v & 0xF];
 
        }
        return new String(macnum, "ASCII");
    }
 
    public String formatMacAddress(String mac) {
        String macfinal;
        macfinal = mac.substring(0, 2) + "-";
        for (int i = 2; i <= 10; i += 2) {
            macfinal += mac.substring(i, i + 2);
            if (i < 10) {
                macfinal += "-";
            }
 
        }
        return macfinal;
    }
 
    public String getFormatedMacAddress() throws MacAddressException {
        String macfinal = getMac().substring(0, 12);
        return macfinal;
    }

    public String getPcName() throws pcNameExceptions {
        try {
            InetAddress.getLocalHost();
        } catch (UnknownHostException ex) {
            throw new pcNameExceptions();
        }
        java.net.InetAddress i = null;
        try {
            i = java.net.InetAddress.getLocalHost();
        } catch (UnknownHostException ex) {
            throw new pcNameExceptions();
        }
        return i.getHostName();
    }
}
#2