multicastclient.java

精通java核心技术》随书源代码

// ==================== Program Discription ===================== 
// 程序名称：示例12-13: MulticastClient.java
// 程序目的：UDP组播客户端。
//=========================================================
import java.io.*;
import java.net.*;
import java.util.*;

public class MulticastClient 
{
    public static void main(String[] args) throws IOException 
    {
        MulticastSocket socket = new MulticastSocket(4446);
        InetAddress address = InetAddress.getByName("136.122.133.1");
	        socket.joinGroup(address);
        DatagramPacket packet;
    
	        for (int i = 0; i < 5; i++) 
        {
	            byte[] buf = new byte[256];
            packet = new DatagramPacket(buf, buf.length);
            socket.receive(packet);
            String received = new String(packet.getData());
            System.out.println("Quote of the Moment: " + received);
        }

	       socket.leaveGroup(address);
	       socket.close();
   }
}