Dear Friends,

I have one question about closing windows produced by mainFrame. In the
following codes, windows "normal frame1" and "normal frame2" produced
by JFrame can be closed without stopping the whole program, but when I
closed window produced by MainFrame, the whole program was stopped as
well.

How to close window produced by MainFrame, without stopping the whole
program?
Thank you very much.
tony

//***************************************************************
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.applet.Applet;

import com.sun.j3d.utils.applet.MainFrame;

public class JFrame2 implements ActionListener
{
   public JFrame2()
   {
       JFrame f = new JFrame("JFrameDemo");
       Container contentPane = f.getContentPane();
       JButton b = new JButton("Click me to get new Window");
       b.addActionListener(this);
       contentPane.add(b);
       f.pack();
       f.show();
   }

   public void actionPerformed(ActionEvent e)
   {
       JFrame newf = new JFrame("normal frame1");
       newf.setSize(200,200);
       newf.show();

    Frame newf4 = new MainFrame(new Applet(), 256, 256);

    JFrame newf2 = new JFrame("normal frame2");
       newf2.setSize(200,200);
       newf2.show();
    }

   public static void main(String[] arg)
   {
       new JFrame2();
   }
}// end JFrame2

//***************************************************************