How do I create a gridlayout of buttons using 2d matrix? (Exended jbutton)

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Java

Matrix

i'm trying to code a Minesweeping game in java and i don't know how to create the board.

What I have tried:

this is my code:

<pre>import javax.swing.*;
import java.awt.*;

public class Board extends JFrame
{
    static final int Col=9;
    static final int Raw=9;
   

    public Board(String title)
        {
            super(title);
            setVisible(true);
            setSize(300,300);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            InitBoard();

        }

        public void InitBoard()
        {
            Board b;
            Button[][] myboard=new Button[Raw][Col];
            Panel p =new Panel();
            p.setLayout(new GridLayout(Raw,Col));
            for (int i=0; i<Col;i++)
            {
                for (int j=0; j<Raw; j++)
                {
                    ImageIcon ic = new ImageIcon("mine.png");
                    Image im=ic.getImage();              
                    myboard[i][j]= new Button(im);
                    p.add(myboard[i][j]);
                    add(p);
                }
            }


        }

    public static void main(String[] args)
    {
        new Board("Minesweeper");

    }

class Button:

import java.awt.*;
import javax.swing.*;

public class Button extends JButton {
    private Image img;

    public Button(Image img)
    {

        this.img = img;
    }
    public Image getIm()
    {

        return this.img;
    }

    public void SetIm(Image im)
    {
        this.img=im;
    }

    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        g.drawImage(img, 0, 0, getWidth(), getHeight(),null);
    }
}