Make all buttons the same size

[Matthew1246]

I want to make the button on the bottom of the screen the same size as the other buttons. In the code:

package com;

import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
public class Boggle extends JFrame {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Boggle bog = new Boggle(4);
	}
	
	protected JButton run = new JButton("run");
	protected JButton[] buttons;
	public Boggle(int xy)
	{
		buttons = Factory.createButtons(xy);
		setLayout(xy);
		setListeners();
	}
	public JButton[] setLayout(int xy)
	{
		setSize(600,600);
		JPanel bigpanel = new JPanel();
		BorderLayout gridlayout = new BorderLayout();
		bigpanel.setLayout(gridlayout);
		
		JPanel panel = new JPanel();
		panel.setLayout(new GridLayout(xy,xy));
		for(int i = 0; i < xy*xy; i++)
		{
			panel.add(buttons[i]);
		}
		bigpanel.add(panel);
		bigpanel.add(run,BorderLayout.SOUTH);
		add(bigpanel);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setVisible(true);
		return buttons;
	}
	public void setListeners()
	{
		for(JButton button: buttons)
		{
			button.addActionListener(new ActionListener()
			{
				JButton normalColour = new JButton();
				public void actionPerformed(ActionEvent ev)
				{
					JButton button = (JButton)ev.getSource();
					if(button.getBackground() == Color.blue)
					{
						button.setBackground(normalColour.getBackground());
					}
					else
					{
						button.setBackground(Color.blue);
					}
				}
			});
		}
		run.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent ev)
			{
				for(int i = 0; i < 4; i++)
				{
					double d = Math.random();
					d = d * 16;
					int num = (int)d;
					JButton button = buttons[num];
					button.setBackground(Color.blue);
				}
			}
		});
	}
}

[subbuija]

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[subbuija]

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[dlorde]

Make your gridlayout one row deeper and add the bottom button to the grid panel ('panel') rather than the 'bigpanel'.