Testing Applet

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

class Circle
{
  // variables
  int x, y, radius;

  // constructors
  public Circle()
  { x = 0; y = 0; radius = 0; }

  public Circle( int x, int y, int radius )
  { this.x = x;  this.y = y;  this.radius = radius; }

  // methods
  void draw( Graphics gr )
  {
    int ulX = x-radius ; // X of upper left corner of rectangle
    int ulY = y-radius ; // Y of upper left corner of rectangle
    gr.drawOval( ulX, ulY, 2*radius, 2*radius );
  }

}

// assume that the drawing area is 200 by 200
public class TestCircle extends JApplet
{
  Circle circ = ;
  
  public void paint ( Graphics gr )
  { 
    circ.draw(  );    
  }
}