JButton not working with for loop...

Question

I am still very new to Java and am having trouble grasping it. I am trying to put together a program that paints a graphic and then each time the "Press Me" button is pressed, an oval randomly appears giving the impression that the picture is 'disappearing' a little at a time. When I run it now, 20 ovals randomly appear all at once instead of waiting for the button to be pushed. Does anyone have any advice for me on how to modify the code? Here is what I have so far...
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.awt.geom.*;
public class JEraseImage extends JApplet implements ActionListener
private ImageIcon image1 = new ImageIcon("bear.jpg");
int startPosX = 80;
int startPosY = 80;
int imageWidth = 275;
int imageHeight = 250;
Container con = getContentPane();
private JButton pressMeButton = new JButton("Press Me");
public void init()
image1 = new ImageIcon("bear.jpg");
con.setLayout(new FlowLayout());
con.add(pressMeButton);
pressMeButton.addActionListener(this);
public void paint(Graphics gr)
gr.drawImage(image1.getImage(), 80, 80, (this));
Graphics2D gr2D = (Graphics2D)gr;
pressMeButton.repaint();
gr.setColor (Color.white);
for(int count = 0; count < 20; ++count)
int x = (int) (Math.random() * imageWidth) + startPosX;
int y = (int) (Math.random() * imageHeight) + startPosY;
gr.fillOval(x, y, 50, 40);
public void actionPerformed(ActionEvent e)
Object source = e.getSource();
if(source == pressMeButton)
repaint();

Answer 1

Here ya go, I think this should do it:
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.util.*;
import javax.swing.*;
import java.awt.geom.*;
public class Junk extends JApplet implements ActionListener
    private ImageIcon image1;
    BufferedImage bi;
    Graphics g;
    int x;
    int y;
    int startPosX = 80;
    int startPosY = 80;
    int imageWidth;
    int imageHeight;
    Container con = getContentPane();
    JButton pressMeButton = new JButton("Press Me");
    public void init()
       image1 = new ImageIcon("bear.jpg");
       bi = new BufferedImage(image1.getIconWidth(), image1.getIconHeight(), BufferedImage.TYPE_INT_RGB);
       g = bi.getGraphics();
       g.drawImage(image1.getImage(), 0, 0, null);
       con.setLayout(new FlowLayout());
       con.add(pressMeButton);
       pressMeButton.addActionListener(this);
    public void paint(Graphics gr){
        super.paint(gr);
        gr.drawImage(bi, startPosX, startPosY, this);
    public void actionPerformed(ActionEvent e)
       g.setColor(Color.WHITE);
       Object source = e.getSource();
       if(source == pressMeButton)
       for(int count = 0; count < 20; ++count)
                 int x = (int) (Math.random() * imageWidth) + startPosX;
                 y = (int) (Math.random() * imageHeight) + startPosY;
                 g.fillOval(x, y, 50, 40);
                 repaint();
}Note: I've not run this.