How to write a chessboard in JAVA?

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

public class ChessBoard {

JFrame frame;
JPanel squares[][] = new JPanel[8][8];

public ChessBoard() {
frame = new JFrame("Chess Board");
frame.setSize(500, 500);
frame.setLayout(new GridLayout(8, 8));

for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
squares[i][j] = new JPanel();

if ((i + j) % 2 == 0) {
squares[i][j].setBackground(Color.black);
} else {
squares[i][j].setBackground(Color.white);
}
frame.add(squares[i][j]);
}
}



frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}

public static void main(String[] args) {
new ChessBoard();
}
}