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

public class Hoops extends Applet
implements AdjustmentListener
{
  private Scrollbar slider;
  private int sliderValue;

  public void init()
  {
    Label title1;
    title1 = new Label ("Circumference: ");
    add(title1);

    slider = new Scrollbar (Scrollbar.HORIZONTAL,1,1,0,101);
    add(slider);
    slider.addAdjustmentListener(this);
  }

    public void paint (Graphics g)
    {
     float diameter = (float) sliderValue/(float) Math.PI;
     g.drawOval(50,70,(int) diameter,(int) diameter);
     g.drawString("The diameter is " + diameter*100+"miles",30,60);
   }
   public void adjustmentValueChanged(AdjustmentEvent e)
   {
    sliderValue = slider.getValue();
    repaint();
   }
}