Stuff

package graficos2d;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Main2 extends JFrame{    int num;        public Main2() {        super("Teste de classe gráfica ");        //this.setSize(300,300);        this.setBounds(200,200,600,480);        this.setVisible(true);    }        public void paint(Graphics g){        super.paint(g);        num = (int)(Math.random()*5)+1;               switch(num){            case 1:g.drawRect(40,40,100,100);            g.drawOval(75,75,30,30);            break;            case 2:g.drawRect(40,40,100,100);            g.drawOval(50,50,40,40);            g.drawOval(90,90,40,40);            break;            case 3:g.drawRect(40,40,100,100);            g.drawOval(40,40,40,40);            g.drawOval(70,70,40,40);            g.drawOval(100,100,40,40);            break;            case 4:g.drawRect(40,40,100,100);            g.drawOval(40,40,40,40);            g.drawOval(40,100,40,40);            g.drawOval(100,40,40,40);            g.drawOval(100,100,40,40);            break;            case 5:g.drawRect(40,40,100,100);            g.drawOval(40,40,40,40);            g.drawOval(40,100,40,40);            g.drawOval(100,40,40,40);            g.drawOval(100,100,40,40);            g.drawOval(70,70,40,40);            break;            case 6:g.drawRect(40,40,100,100);            g.drawOval(40,40,30,30);            g.drawOval(40,110,30,30);            g.drawOval(40,75,30,30);            g.drawOval(110,40,30,30);            g.drawOval(110,110,30,30);            g.drawOval(110,75,30,30);            break;        }            }    public static void main(String[] args) {        new Main2().setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    }    }