a GUI application that presents a game based on a 4 by 4 matrix of buttons.One of the buttons (selected at random) "hides" the prize. A status bar at the top of the window shows the number of guesses. When the prize button is pressed, the status bar shows "You got it in x attempts!". While pressing buttons, the distance to the destination (x + y distance) is shown on the button.
this is my assigment and here is my code the problem is I cant find the coordinates of buttons so I cant find distance does anyone have suggestion about this?? thnks to all:)

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Random;

public class PotLuck extends JFrame implements ActionListener
{
	ArrayList<JButton> buttons;
	private int count;
	Random prize;
	private int prizeNo;
	private JLabel countLabel;
	JButton prizeButton;
	
	public PotLuck()
	{
		count = 0;
		prize = new Random();
		buttons = new ArrayList<JButton>();
		
		setLayout(new BorderLayout());
		
		countLabel = new JLabel( "Guesses: " + count );
		add(countLabel,BorderLayout.NORTH);
			
		JPanel myPanel=new JPanel(new GridLayout(4,4));
		add(myPanel,BorderLayout.CENTER);	

		
		
		setBounds( 0 , 0 , 500 , 500 );		
		setTitle( " PotLuck Game " );
		setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);
		

		
		for( int i = 0; i < 16; i++ )
		{
			buttons.add( new JButton(" "+ (i+1) + " "));
			myPanel.add( buttons.get(i) );
			(buttons.get(i)).addActionListener( this );	
		}

		
		prizeNo = prize.nextInt(16) + 1;
		prizeButton = buttons.get(prizeNo-1);
		
		setVisible( true );
	}
	
	public void actionPerformed( ActionEvent e)
	{
		count++;
		countLabel.setText("Guesses: " + count);
	
		JButton curButton = (JButton)e.getSource();
		
		if( prizeButton.equals( curButton ))
		{
			countLabel.setText("You got it in " + count + "attempts.");
			for( int i = 0; i < buttons.size() ; i++ )
			{
				(buttons.get(i)).disable();
				(buttons.get(i)).removeActionListener( this );
			}
				
		}		
		
	}
}

You are using a GridLayout, so it seems to me that it's fairly easy to get the coordinates. The width of a button is the width of the panel divided by the number of buttons per row (4). The height of a button is the height of the panel divided by the number of buttons per column (4). So if the panel is 480 x 480 (subtracting a bit from 500 x 500, but get an exact value of the panel's width and height), each button is 120 x 120. So the upper-left coordinates of the button at location (2, 3) would be (120 * 2, 120 * 3) = (240, 360) relative to the upper-left coordinate of the panel that holds them. The lower right coordinates can be obtained by adding 120 to the upper left:

(240 + 120, 360 + 120) = (360, 480).

So the button at (2,3) is bounded by (240, 360), (360, 480)

All measurements are relative to the panel, not the JFrame.

Actually, you can do the above, but it's probably better to get the info directly from the button itself.

Point p = prizeButton.getLocation();
        System.out.println (p.x);
        System.out.println (p.y);
        System.out.println (prizeButton.getWidth());
        System.out.println (prizeButton.getHeight());

But there is also JLabel here how can I find the size of panel:S

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