Grid bag layout not displaying the way I want

Question

So I have 6 panels, all of them used a grid layout. And I put them together using gridbaglayout, here is the design I wanted

Answer 1

Here is (another) alternative nested layout. Panels 3 through 6 will get extra height, the extra width will be divided evenly amongst all 6 panels.

import java.awt.*;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;

public class SixPanelNested {

    SixPanelNested() {
        JPanel gui = new JPanel(new BorderLayout());
        gui.setBorder(new TitledBorder("BorderLayout()"));

        JPanel north = new JPanel(new GridLayout(1,0));
        north.setBorder(new TitledBorder("GridLayout(1,0)"));
        gui.add(north, BorderLayout.NORTH);
        for (int ii=1; ii<3; ii++) {
            JLabel l = new JLabel("Panel " + ii);
            l.setBorder(new LineBorder(Color.BLACK));
            north.add(l);
        }

        JPanel south = new JPanel(new GridLayout(1,0));
        south.setBorder(new TitledBorder("GridLayout(1,0)"));
        gui.add(south);
        for (int ii=3; ii<7; ii++) {
            JLabel l = new JLabel("Panel " + ii);
            l.setBorder(new LineBorder(Color.BLACK));
            south.add(l);
        }

        JOptionPane.showMessageDialog(null, gui);
    }

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new SixPanelNested();
            }
        });
    }
}