Desktop to socket programming conversion problem?

Question

i have a Online desktop application.
i want to convert in Socket programming for Efficiency and Quick response.
i successfully connect client to server and server to client its work well.
now problem is that i had in application different type of objects , Database quires results, some Business class and other needed class.
how i pass these thinks to server to client and vice versa and distinguish them?

Answer 1

I am very THANK Full for your Efforts
i locked my xml file succssfuly; but i still got same exception
locking a file code
Initializing streams
try {
            is = new ObjectInputStream(clientSocket.getInputStream());
            os = new ObjectOutputStream(clientSocket.getOutputStream());
           fs = new FileOutputStream("first.xml");
            BufferedOutputStream br = new BufferedOutputStream(fs);
            xml = new XMLEncoder(br);
        } catch (IOException e) {
            System.out.println(e);
Locking a file it display file is locked
     System.out.println("Trying to lock locked..");
      fl = fs.getChannel().tryLock();
      System.out.println("File locked..");
      xml.writeObject(ud);
      xml.flush();
      fl.release();
      System.out.println("lock released...");    
      fl.release();
      is.close();
      os.close();
      xml.close();
      clientSocket.close();