UDP實現的多線程windows窗口對話

package com.hbsi.net;

import java.awt.Color;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.text.TableView;

public class PAP implements Runnable {

 /**
  * @param args
  */
 public static void main(String[] args) {

  new Thread(new PAP()).start();
  new Thread(new Runnable() {
   public void run() {
    try {

     DatagramSocket ds = new DatagramSocket();

     BufferedReader br = new BufferedReader(
       new InputStreamReader(System.in));

     String line = null;

     while ((line = br.readLine()) != null) {
      if (line.equals("886")) {
       break;
      }
      byte[] buf = line.getBytes();
      DatagramPacket dp = new DatagramPacket(buf, buf.length,
        InetAddress.getByName("192.168.49.255"), 4455);
      ds.send(dp);
     }
     ds.close();
    } catch (Exception e) {
     e.toString();
    }

   }
  }).start();

 

 }

 public void run() {
  try {

   DatagramSocket ds = new DatagramSocket(4455);

   while (true) {
    byte[] buf = new byte[1024];

    DatagramPacket dp = new DatagramPacket(buf, buf.length);

    ds.receive(dp);

    String ip = dp.getAddress().getHostAddress();
    String data = new String(dp.getData(), 0, dp.getLength());
    System.out.println(ip + ":" + data);
   }
   // ds.close();

  } catch (Exception e) {
   e.toString();
  }

 }
}