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


public class Class {



public static void main(String[] args){
     int x = 500; int y = 500;

    JFrame f = new JFrame("Pixels");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    GUI p = new GUI();
    p.setBackground(Color.WHITE);
    f.add(p);
    f.setSize(x,y);
        f.setVisible(true);


}
}




import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Random;

public class GUI extends JPanel {
    private final static int MAX_X = 1920;
    private final static int MAX_Y = 1080;

    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        for (int x = 0; x < MAX_X; x++) {
            for (int y = 0; y < MAX_Y; y++) {

                Color randomColor = Color.BLACK; //Black because it wouldn't work uninitialized.

                //Slightly inefficient?
                int number; Random rColor = new Random();
                number = rColor.nextInt(3);

                 if(number == 0){randomColor = Color.RED;}
                 else if(number ==1){randomColor = Color.GREEN;}
                 else if(number == 2){randomColor = Color.BLUE;}


                g.setColor(randomColor); //Red, Blue, or Green. Depends on if number is 0, 1 or 2.
                g.drawRect(x, y, 1, 1);
            }


        }

    }
}