Compito

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
/**
 *
 *
 * @author Giacinto Di Santis
 * @version 02.04.2020
 */

public class IdenticonFrame extends JFrame {

    public final int MARGIN = 50;

    public IdenticonFrame() {
        super("IdemticonFrame");
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setSize(300,300);
    }

    public boolean avatar[][]={
        {true,  true,  true,  true,  true},
        {false, false, false, false, false},
        {true,  false, true,  false, true},
        {true,  false, false, false, true},
        {true,  false, false, false, true}
    };

    public void paint(final Graphics g) {
        super.paint(g);
        int x;
        int y;
        for(x = 0; x < avatar.length; x++){
            for(y = 0; y < avatr[x].length; y++){
                if(avatar[x][y] == true){
                    g.setColor(Color.BLACK);
                }else{
                    g.setColor(Color.WITHE);
                }
                if(getHeight() > getWidth()){
                    g.fillRect(0, 0, (getWidth() - (2 * MARGIN)) / 5, (getWidth() - (2 * MARGIN)) / 5);
                }else{
                    g.fillRect(0, 0, (getHeigth() - (2 * MARGIN)) / 5, (getHeigth() - (2 * MARGIN)) / 5);
                }
            }
        }
    }

    public static void main(final String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new IdenticonFrame().setVisible(true);
            }
        });
    }

}