如何实现基于UDP的socket的通信

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private static final String ServerIP = "192.168.173.1" ;private static final int ServerPort = 4568;

在按钮点击事件中写入

new Thread( new Server()).start();  try {        Thread.sleep(500);       }  catch (InterruptedException e)  {      }   new Thread( new Client()).start();

其中client和server的类定义如下：

public class Client implements Runnable {                      @Override                      public void run() {                           /*while (start == false) {                          }  */                   try {                               Thread.sleep(500);                           } catch (InterruptedException e1) {                              // TODO Auto-generated catch block                              e1.printStackTrace();                          }                          try {                              InetAddress serverAddr = InetAddress.getByName(ServerIP );                            /*  updatetrack ("Client: Start connecting\n");  */                             DatagramSocket socket = new DatagramSocket();                              byte[] buf;                                                             buf = ( "abc").getBytes();                                                          DatagramPacket packet = new DatagramPacket(buf, buf.length,                                      serverAddr, ServerPort);                             /* updatetrack ("Client: Sending ‘" + new String(buf ) + "’\n");  */                              socket.send(packet);                             /* updatetrack ("Client: Message sent\n");                               updatetrack("Client: Succeed!\n"); */                          } catch (Exception e) {                              /* updatetrack ("Client: Error!\n");  */                          }                       }                   }                                 public class Server implements Runnable {                      @Override               public void run() {                          /*while (start == false) {                         }  */                        try {                             InetAddress serverAddr = InetAddress.getByName(ServerIP );                              /*updatetrack ("\nServer: Start connecting\n");  */                             DatagramSocket socket = new DatagramSocket(ServerPort ,                                      serverAddr);                             byte[] buf = new byte[17];                            DatagramPacket packet = new DatagramPacket(buf, buf.length);                            /* updatetrack ("Server: Receiving\n");  */                              socket.receive(packet);                             /* updatetrack ("Server: Message received: ‘"                                       + new String(packet.getData()) + "’\n");                              updatetrack("Server: Succeed!\n");  */                         } catch (Exception e) {                            /* updatetrack ("Server: Error!\n");  */                         }                     }                 }

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