CanvasApplet

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


public class CanvasApplet extends Applet {
public void init(){
setLayout(new BorderLayout());

Circle3D circle=new Circle3D();

add(circle,BorderLayout.CENTER);
}
}

class Circle3D extends Canvas{

public void paint(Graphics g){

Dimension size=getSize();

int d=0;
if (size.width d=size.width;
} else {
d=size.height;
}

g.setColor(Color.gray);
g.fillOval(3,2,d,d);

g.setColor(Color.blue);
g.fillOval(0,0,d,d);

}
}