Hello,

When I put a JPanel with a GridLayout, followed by a
Box.createVerticalGlue, why does not all the extra space go into the
glue? It seems that the extra space is spread within the gridLayout and
the glue.

With the following code, there is plenty of space inside the JPanel
mainPanel. How can I force all the extra space to go in the glue ?

Thanks.

import java.awt.GridLayout;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;

public class MyApplet extends JApplet  {
   
   public void init() {  
       try {
           javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
               public void run() {
                   createGUI();
               }
           });
       } catch (Exception e) {}
   }
   
   private void createGUI() {
       JPanel mainPanel = new JPanel();
       mainPanel.setLayout(new GridLayout(2,2));
       
       JPanel panel = new JPanel();
       panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
       panel.setBorder(BorderFactory.createTitledBorder("panel"));

       JButton button1 = new JButton("button 1");
       panel.add(button1);
       
       mainPanel.add(panel);
       
       JPanel otherpanel = new JPanel();
       otherpanel.setLayout(new BoxLayout(otherpanel,
BoxLayout.Y_AXIS));
       otherpanel.setBorder(BorderFactory.createTitledBorder("other
panel"));

       JButton button2 = new JButton("button 2");
       otherpanel.add(button2);

       mainPanel.add(otherpanel);

       JButton button3 = new JButton("button 3");
       mainPanel.add(button3);
       JButton button4 = new JButton("button 4");
       mainPanel.add(button4);

       getContentPane().setLayout(new BoxLayout(getContentPane(),
BoxLayout.Y_AXIS));
       getContentPane().add(mainPanel);
       getContentPane().add(Box.createVerticalGlue());
   }
   
   public void start() {}
   
   public void stop() {}
   
   public void destroy() {}
   
}