import java.net.*;
import java.io.*;
public class McastClient{
    public static void main(String[] args){
        try{
            //創建2345端口的廣播套接字
            MulticastSocket msocket = new MulticastSocket(2345);
            //得到230.0.0.4的地址信息,將廣播套接字綁定到地址上
            InetAddress address=InetAddress.getByName("230.0.0.4");
            msocket.joinGroup(address);
            for(int i=0;i<10;i++){
                //創建接收數據報 
                byte[] b = new byte[256];
                DatagramPacket dp = new DatagramPacket(b,b.length);
                msocket.receive(dp);
                System.out.println("接收到數據："+new String(b));  
            }
            msocket.leaveGroup(address);
            msocket.close();
        }catch(IOException e){System.out.println(e.toString());}
    }
}