Enumeration<NetworkInterface> ni =  null ;
        NetworkInterface eth;
         try  {
            ni = NetworkInterface.getNetworkInterfaces();
        }  catch  (SocketException e) {
            e.printStackTrace();
        }
         if  (ni !=  null ) {
             while (ni.hasMoreElements()){
                eth = ni.nextElement();
                addressList.put(eth.getDisplayName(),eth.getInetAddresses().nextElement());
                NetAdaptersList.addItem(eth.getDisplayName());
            }
        }