基于java的开发源码-UDP服务器模型源代码.zip

import java.awt.event.*; import java.net.*; import javax.swing.*; //Download by http://www.codefans.net public class UDPClientDemo extends JFrame{ String host="localhost"; //服务器地址 int port=2345; //端口号 public UDPClientDemo(){ try{ DatagramSocket socket=new DatagramSocket(); //实例化一个数据报Socket InetAddress address=InetAddress.getByName(host); //服务器地址 byte[] buffer=new byte[256]; //缓冲区 DatagramPacket packet=new DatagramPacket(buffer,buffer.length,address,port); //实例化一个数据报 socket.send(packet); //发送报文 packet=new DatagramPacket(buffer,buffer.length); socket.receive(packet); //接受回应 String message=new String(packet.getData()); //得到报文信息 System.out.println("Received from: "+packet.getAddress()); //显示信息源地址 System.out.println(message); //显示服务器返回信息 socket.close(); //关闭端口 } catch (Exception ex){ ex.printStackTrace(); //输出出错信息 } } public static void main(String[] args){ new UDPClientDemo(); } }