Scrollbar2Applet

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class Scrollbar2Applet extends Applet {

Scrollbar myScroll;

int circleW=10;
int circleH=10;

public void init() {
myScroll = new Scrollbar(Scrollbar.VERTICAL,0,1,0,30);
add(myScroll);
myScroll.addAdjustmentListener(new AdjustmentListener(){
public void adjustmentValueChanged(AdjustmentEvent evt){
int xLen= evt.getValue();
circleW=10*xLen;
circleH=10*xLen;
repaint();
}
});
}

public void paint(Graphics g){
g.setColor(Color.black);
g.fillOval(10,20,circleW,circleH);
}
}