Exception in thread "main" java.lang.StackOverflowError

[Colm Dickson]

Hello all,


I have a book where a project example on GUI does not run in Netbeans. The project consists of 2 classes whcih I show below and the error is

Exception in thread "main" java.lang.StackOverflowError
at sun.awt.Win32GraphicsConfig.getBounds(Native Method)
at sun.awt.Win32GraphicsConfig.getBounds(Win32GraphicsConfig.java:295)
at java.awt.Window.init(Window.java:284)
at java.awt.Window.<init>(Window.java:318)
at java.awt.Frame.<init>(Frame.java:419)
at java.awt.Frame.<init>(Frame.java:384)
at javax.swing.JFrame.<init>(JFrame.java:150)
at guitest.DemoFrame.<init>(DemoFrame.java:24)
at guitest.DemoFrame.<init>(DemoFrame.java:26)
at guitest.DemoFrame.<init>(DemoFrame.java:26)
at guitest.DemoFrame.<init>(DemoFrame.java:26)

and so it continues..

Here are the classes( belonging to package guitest). Can anyone help as to why this occurs?

Many thanks,

Colm.

package guitest;
import java.awt.*;
import javax.swing.*;

public class FrameDemo1 extends JFrame
{
   private JButton t;
   private JButton b;
   private JButton l;
   private JButton r;
   public FrameDemo1(String title)
   {
      setTitle(title);
      setSize(210,297);
      setLocation(200,200);
      // Create the buttons.
      t = new JButton("Top");
      b = new JButton("Bottom");
      l = new JButton("Left");
      r = new JButton("Right");
      // Add the buttons to the content pane.
      Container cp = getContentPane();
      cp.add(t,BorderLayout.NORTH);
      cp.add(b,BorderLayout.SOUTH);
      cp.add(l,BorderLayout.WEST);
      cp.add(r,BorderLayout.EAST);
   }
}

package guitest;
public class FrameDemo1Test
{
   public static void main(String[] args)
   {
      FrameDemo1 fd1 = new FrameDemo1("A4 Page");
      fd1.setVisible(true);
   }
}

[Paul Clapham]

But that stack trace comes from a class named "DemoFrame". You haven't posted any code from a class of that name.

[Colm Dickson]

Hi..yes that was strange..never actually twigged onto that.

It's working now. I cleaned and rebuilt the project and I think the main class for this project was not pointing at the right class so everything is fine noe anyway thanks!!.


Colm