Board

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

public class Board {
    JButton button[];

    JPanel board;
    JPanel x1; JPanel x2; JPanel x3; JPanel x4; JPanel x5;JPanel x6; JPanel x7; JPanel x8;
    Board(){
        board = new JPanel();
        BorderLayout bl = new BorderLayout();
        board.setLayout(bl);

        for (int i=0; i<=5; i++) {
            button[i] = new JButton(""+i);
        }

        x1 = new JPanel();
        GridLayout gl = new GridLayout(8,8);
        x1.setLayout(gl);

        for (int i=1; i<65; i++) {
            x1.add(button[i]);
        }

        board.add("Center", x1);

        JFrame frame = new JFrame("Chess");
        frame.setContentPane(board);

        frame.pack();

        frame.setVisible(true);

    }
    public static void main(String[] args) {
        Board b = new Board();
    }
}