Java ServerSocket receive object from client

import java.io.ObjectInputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Main {
   public static void main(String argv[]) throws Exception {
      // create a server socket at port 6789
      ServerSocket serverSocket = new ServerSocket(6789);
      // wait for incoming connection
      System.out.println("Server is listening on port 6789");
      Socket socket = serverSocket.accept();
      System.out.println("Request accepted");
      // Create an ObjectInputStream Object
      ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
      // Restore the object
      Message msg = (Message) in.readObject();
      // Print the mesaage
      System.out.println("Received a message:");
      System.out.println("subject : " + msg.getSubject() + "\nbody  :" + msg.getText());
   }//from  w w  w  . jav  a 2s.co  m
}

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;
   }
}