multicasttimeclient.java

让初学者了解javaUDP的编程及应用

import java.io.*;
import java.net.*;
import java.util.*;

public class MulticastTimeClient {
    public static void main(String[] args) throws IOException {
        byte[] buf = new byte[128];
        DatagramPacket packet;
 
        MulticastSocket socket = new MulticastSocket(6666);
		InetAddress group = InetAddress.getByName("230.0.0.1");
		socket.joinGroup(group);
		packet = new DatagramPacket(buf, buf.length);
		socket.receive(packet);

        String received = new String(packet.getData());
        System.out.println("Nettime is: " + received.trim());

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