Java DatagramSocket receive object from UDP client

import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class Main {
   public static void main(String[] args) {
      try {//from www. ja  v  a 2s . c  om
         // Create a MulticastSocket and bind it to port 8379
         DatagramSocket socket = new DatagramSocket(8379);
         // Construct a DatagramPacket to receive packet
         byte[] in = new byte[256];
         DatagramPacket packet = new DatagramPacket(in, in.length);
         System.out.println("Waiting to receive a Message object...");
         // Receive the packet now and display
         socket.receive(packet);
         ByteArrayInputStream bais = new ByteArrayInputStream(in);
         ObjectInputStream ois = new ObjectInputStream(bais);
         Message msg = (Message) ois.readObject();
         System.out.println("Received a message:");
         System.out.println("subject : " + msg.getSubject() + "\nbody  :" + msg.getText());
      } catch (Exception ioe) {
         System.out.println(ioe);
      }
   }
}

class Message implements java.io.Serializable {
   String subject, text;

   Message(String s, String t) {
      this.subject = s;
      this.text = t;
   }

   String getSubject() {
      return subject;
   }

   String getText() {
      return text;
   }
}