Dispose JDialog by code, don't let the user close it

Question

I have a short code, i would like to dispose a dialog, but don't want the user to be able to close it, it just doesnt work, help me please.

    import javax.swing.*;
    public class Processing extends JOptionPane{

    JDialog jd;
    public Processing(){
        super(null, JOptionPane.DEFAULT_OPTION, 
                  JOptionPane.INFORMATION_MESSAGE, null, new Object[]{});
        Icon processPic = new ImageIcon("C:\\Users\\Judit\\Desktop\\Mesekocka3D"
                + "\\externals\\pics\\szamitas.gif");

        setMessage(processPic);
        jd = createDialog("Számítás");

        jd.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
        jd.setVisible(true);
        jd.dispose();
    }   
}

this is how my code looks like now, I use Jdialog instead of Joptionpane, should i write more characters to make the website accept my edit?

import javax.swing.*;



public class Mifasz
{
 private static class Processing extends JDialog{

public Processing(){
    Icon processPic = new ImageIcon("C:\\Users\\Judit\\Desktop\\Mesekocka3D"
            + "\\externals\\pics\\szamitas.gif");
    JLabel label = new JLabel(processPic);
    add(label);
    setTitle("Számítás");
    setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);        
    setSize(400, 70);
    setLocation(330, 300);
    setModal(true);
    setVisible(true);
    dispose();
}       
}

  public static void main(String[] args)
  {
    Processing pc = new Processing();
  }

}

Answer 1

Okay, so I've found a very easy solution: I just disable the mainframe, while processing. How to make a JFrame Modal in Swing java