1 package cn.network.demo01; 2  3 import java.io.IOException; 4 import java.net.DatagramPacket; 5 import java.net.DatagramSocket; 6  7 import javax.swing.plaf.synth.SynthStyle; 8  9 public class UDPService10 {11     public static void main(String[] args)throws IOException12     {13         //14         DatagramSocket dSocket = new DatagramSocket(6000);15         16         byte[] data = new byte[1024];17         18         while(true)19         {20             DatagramPacket dPacket = new DatagramPacket(data, data.length);21             22             dSocket.receive(dPacket);23             24             int length = dPacket.getLength();25                     26             System.out.println(new String(data,0,length));27             System.out.println(dPacket.getAddress().getHostAddress() +":ip");28         }29         30         31         32         //dSocket.close();33     }34 }