Fill space in panel with GridBagLayout

Question

Hello,
I have a class that extends JPanel and uses a GridBagLayout.
I would like the contents of this panel to occupy the whole available space.
However, I don't find how to do it with GridBagLayout (I know this is automatically done with BorderLayout but I want to use GridBagLayout for organizing internal components).
I have this small program to show the problem.
In this example, how could the button fill all the available space with GridBagLayout?
Note that setting GridBagConstraints fill to BOTH doesn't solve the issue.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.LayoutManager;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestBlankSpace {
    private static int x = 200;
    public static void main(String[] args) {
     testPanel(new BorderLayout(), BorderLayout.CENTER);
     testPanel(new GridBagLayout(), createGridBagConstraints());
    private static void testPanel(LayoutManager manager, Object constraints) {
     JPanel panel = new JPanel(manager);
     JButton button = new JButton("button");
     button.setBackground(Color.ORANGE);
     panel.setBackground(Color.WHITE);
     panel.add(button, constraints);
     JFrame window = new JFrame("Test Panels");
     window.add(panel);
     window.setLocation(x, 200);
     window.setSize(400, 300);
     window.setVisible(true);
     window.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
     x += 400;
    private static GridBagConstraints createGridBagConstraints() {
     GridBagConstraints c = new GridBagConstraints();
     c.fill = GridBagConstraints.BOTH;
     return c;
}Thank you

Answer 1

Hi,
For better understanding the grid bag layout read this tutorial :
[http://java.sun.com/docs/books/tutorial/uiswing/layout/gridbag.html|http://java.sun.com/docs/books/tutorial/uiswing/layout/gridbag.html]
Olek