Help with Gridbag Layout

[gaz123]

I realise this is probably something simple, but here goes. I'm a home-taught student and have been set the task of creating a GUI and engine for a game. My engine works fine, as did my GUI before my tutor told me he doesn't want me to do the UI as I had but instead wants it done using Gridbag. After a few hours of struggling with tutorials, I've written part of the GUI and checked it only to find it was all over the place. I asked my tutor for help, the response was simply "use an internet forum or a tutorial, you'll learn more because you'll have to work through it". Yes, I know he's a bad tutor but since it's my parents that decide these things I can't say much (apparently my dad worked with him years ago). However, I would appreciate some help fixing what I've done.

The GUI should look something like this: -

--------------------------------------------------------
---------------------------NIM-----------------------
--------------------------------------------------------
---Computer---[=]--*----*--[=]----Player----
--------------------------------------------------------
----------------------[End Turn]-------------------

(Sorry for the terrible psudo-image)

Instead I end up with everything overlapping. This is probably because I'm trying to convert my former UI into gridbag.

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.sound.sampled.*;
import javax.swing.*;
 
public class UI extends JFrame
{
 GridBagLayout gbl;
 
 public UI ()
 {
  super ("NIM");
 
  setDefaultCloseOperation (EXIT_ON_CLOSE);
 
  getContentPane ().add (buildGUI ());
 
  pack ();
 
  setVisible (true);
 }
 
 public JPanel buildGUI ()
 {
  JPanel panel = new JPanel (gbl = new GridBagLayout ());
  GridBagConstraints gbc = new GridBagConstraints ();
 
  JLabel lblTitle = new JLabel ("NIM");
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 0;
  gbc.gridy = 0;
  gbc.gridwidth = 6;
  gbc.anchor = GridBagConstraints.PAGE_START;
  panel.add (lblTitle, gbc);
 
 
  JLabel lblComputer = new JLabel ("Computer");
  JTextField txtComputer = new JTextField (2);
  lblComputer.setLabelFor (txtComputer);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 0;
  gbc.gridy = 1;
  panel.add (lblComputer, gbc);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 1;
  gbc.gridy = 1;  
  panel.add (txtComputer, gbc);
 
 
  JLabel lblScoreCPU = new JLabel ("*");
  JLabel lblScorePLY = new JLabel ("*");
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 1;
  gbc.gridy = 2;  
  panel.add (lblScoreCPU, gbc);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 1;
  gbc.gridy = 3;  
  panel.add (lblScorePLY, gbc);
 
 
  JLabel lblPlayer = new JLabel ("Player");
  JTextField txtPlayer = new JTextField (2);
  lblPlayer.setLabelFor (txtPlayer);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 4;
  gbc.gridy = 1;  
  panel.add (txtPlayer, gbc);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 5;
  gbc.gridy = 1;  
  panel.add (lblPlayer, gbc);
 
 
  JButton btnEnd = new JButton ("End Turn");
  Dimension size = btnEnd.getPreferredSize ();
  size.width = 100;
  btnEnd.setPreferredSize (size);
 
  gbc.fill = GridBagConstraints.HORIZONTAL;
  gbc.weightx = 0.5;
  gbc.gridx = 0;
  gbc.gridy = 2;  
  gbc.gridwidth = 6;
  panel.add (btnEnd, gbc);
 
  return panel;
 }
 
 
 public static void main (String [] args)
 {
  new UI ();
 }
}
 

(The rest of the code is "yet to be converted", mainly involes the engine and a drag-drop area)

If anyone can help, that'd be great. Thanks.

[r035198x]

...
Instead I end up with everything overlapping. This is probably because I'm trying to convert my former UI into gridbag.

....

Have you gone through the GridBagLayout tutorial?

[gaz123]

Have you gone through the GridBagLayout tutorial?

Yes, I thought I mentioned in the origional post I had. I've gone through several different tutorials.

[gaz123]

Is nobody able to see what I've done wrong? I need to get this finished over the weekend, please help.