static

Static.java

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

public class Static extends JFrame
{
    static int HEIGHT;
    static int WIDTH;
    
    public static void main(String[] args) throws Throwable 
    {
	Graphics gr; 
	BufferedImage bg;
	Static a = new Static();
	/*
	WIDTH=Integer.parseInt(args[0]);
	HEIGHT=Integer.parseInt(args[1]);
	int size=Integer.parseInt(args[2]);
	*/
	WIDTH=800;
	HEIGHT=600;
	int size=6;
	a.setSize(WIDTH, HEIGHT);
        a.setResizable(false);
        a.setVisible(true);
	a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gr = a.getGraphics(); 

	while (true)
	{
	   
	    bg=getBackground(WIDTH,HEIGHT,size);
	    gr.drawImage(bg, 0, 0, null);
	    Thread.sleep(1000/100); // sleep a bit
	}
    }

    static BufferedImage getBackground(int WIDTH, int HEIGHT, int size)
    {
	Random rand=new Random();
	BufferedImage background = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
	Graphics2D bg2 = (Graphics2D) background.getGraphics();
	for (int x=0; x<WIDTH; x+=size) {
	    for (int y=0; y<HEIGHT; y+=size) {
		int r=rand.nextInt(255);
		Color color = new Color(r, r, r);
		bg2.setColor(color);
		bg2.fillRect(x,y,size,size);
	    }
	}
	return background;
    }
}