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

public class Grafico extends JFrame {
    int position;
    
    private JButton bt;
  
    
    public Grafico () {
        super("Teste de uma Classe Gráfica");
        this.setSize(600,600);
        this.setVisible(true);  
    }
    public void paint (Graphics g) {
        super.paint(g);
        for(int i=0;i<5000;i++)
        {
        g.setColor(new Color 
                (position = (int)(Math.random()* 256),
                position = (int)(Math.random()* 256),
                position = (int)(Math.random()* 256)));
        
        
        g.fillRect((int)(Math.random()* 200)+23, 
                   (int)(Math.random()* 200)+23,
                   (int)(Math.random()* 200)+23,
                   (int)(Math.random()* 200)+23);
        }  
    }
    
    
    public static void main(String[] args) {
        new Grafico().setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}