广播即时通信src和des

package 第十二章;
 
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.util.Scanner;
 
public class GuangBoSrc {
//	发送广播
	public static void main(String[] args) throws IOException {
		InetAddress ip=InetAddress.getByName("230.0.0.1");
 
		MulticastSocket multicastSocket=new MulticastSocket(55555);
		multicastSocket.joinGroup(ip);
 
		byte[]b="该起床了！！".getBytes();<pre name="code" class="java">package 第十二章;
 
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.UnknownHostException;
 
public class GuangBoDes {
//	接收广播
	public static void main(String[] args) throws IOException {
		InetAddress ip=InetAddress.getByName("2300.0.1");
		MulticastSocket multicastSocket=new MulticastSocket(55555);
		multicastSocket.joinGroup(ip);
 
		byte[]b=new byte[1024];
		DatagramPacket packet =new DatagramPacket(b, b.length);
		multicastSocket.receive(packet);
 
		String str=new String(packet.getData(),0,packet.getLength());
 
	}
 
}

DatagramPacket packet=new DatagramPacket(b, b.length, ip, 55555);multicastSocket.send(packet);}}