2D objects Serialization problem

Question

Welcome!
I'm making a net game using RMI and I have this problem.
When I'm trying to join my client with the server an error occures:
Error: error marshalling arguments; nested exception is:
     java.io.NotSerializableException: java.awt.geom.Ellipse2D$Double
My client contains an Object extending a JPanel class. There are 2D object used to make the map, and that's why this error occures.
It's a funny thing, cause I'm not sending a whole Object of my client, but only it's refference (using "this" in the join() method) so I dont know why does the 2D object need to be serialized and sent :|?
Any way, my question is how to make 2D objects serializable!? I have jdk1.5.0_06 and as far as I remember they should be srializable in this version. Mabey I'm dooing something wrong!? Mabey it's nessesary to ad an appropreate code-line or import sth... i don't know
please help me... I have little time to finish my project, and this thing is blocking my work.
Big thanks to anybodey who will help.
regards floW

Answer 1

I'll tel u the whole story then, my problem is as follows:
public class BounceThread{
   public static void main(String[] args)   {
      JFrame ramka = new BounceFrame();
         ramka.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         ramka.setVisible(true);
class BounceFrame extends JFrame{
public BounceFrame()
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      setTitle("MiniGolf v 1.0");
      panel = new BallPanel(); // this contains maps made with 2D objects
      panel.setBackground(Color.green);
      panel.setVisible(panel.czy_widać_panel());
      add(panel, BorderLayout.CENTER);
// I add a menu bar, that starts a net game:
JMenuBar pasekMenu = new JMenuBar();
          setJMenuBar(pasekMenu);
          JMenu menuGra = new JMenu("Game");
       // and so on... and finaly I add an option:
          menuGame_Nowa.add(new
                    AbstractAction("Net game")
                         public void actionPerformed(ActionEvent event)
                              net_game(panel);
// here i write my net_game method:
public void net_game(BallPanel aPanel)
     //here, i make an Client object, and connect him with my server
     client = new mgClient(panel);
     client.join();
     // I give panel as a paramete, cause I cant think of another way of leting my server to uce it's (panels) methods
     // If I join only a name of my client, then how can I change the panel in my BounceFrame from the Clients method
     // "shouted" by the server!? It has to be a field in the client's object.
     // Is there any other way out!?
// Class BouceFrame holds the panel as a field:
private mgClient client;
private BallPanel panel;
//and so on...
}and that's the real problem I'm facing here. Is there any solution!? I think, that making a Client's field out of my panel is the only way ot. And that means I need those 2D objects serialized... :(
Please help if u can.
Regards floW