Java For Loop Inside Constructor is Infinitely Repeating

So, for some reason when I try to use a for loop to initialize panels in chess board, it actually loops the loop itself. In other words, it doesn't go on forever, but it starts and comp开发者_开发知识库letes again and again.

package chessgame;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ChessGame extends JFrame implements ActionListener{

    public static final int WIDTH=800;
    public static final int HEIGHT=800;

    public static void main(String[] args) {
        ChessGame gui = new ChessGame();
        gui.setVisible(true);
    }
    public ChessGame(){
        super("Chess Game Demo");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new GridLayout(8,8));
        JPanel[] chessSquares = new JPanel[64];
        for (int a=0;a<64;a++){
            System.out.println(a);
        }
    }
}

I have included all potentially relevant code because I plan to use indices of chessSquares to color squares black and white. When I do this I also get a NullPointerException. I can understand why I'm getting that given the following error, but I cannot at all understand why a would be printed 0, 1....62, 63 over and over again. I am relatively new to Swing and have absolutely no idea why it does this. If anyone could explain that would be tremendously helpful. Thanks.

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Don't put meaningful initialization in ChessGame's constructor, but instead override frameInit. When you do, also be sure to call super.frameInit(). See the javadoc or this tutorial.