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

public class Cerchi extends JApplet {

Display disegno;
int k = (int)((Math.random()*100)); //numero cerchi (da 1 a 100)

public void init(){

disegno = new Display();
setContentPane(disegno);
}

class Display extends JPanel {
public void paintComponent(Graphics g){
for(int i=0;i<k;i++){
g.setColor( new Color ((float)Math.random(),
(float)Math.random(),(float)Math.random()));
g.fillOval((int)(Math.random()*getSize().width),(int)(Math.random()*getSize().height),100,100);
}
}
}
}