1    /* 
2    program to paint a Kanizsa square. 
3     */
4    
5    package npw;
6    
7    import java.awt.Color;
8    import javax.swing.SwingUtilities;
9    import painter.SPainter;
10   import shapes.SCircle;
11   import shapes.SSquare;
12   
13   public class KanizsaSquare {
14       private void paintTheImage() {
15           SPainter painter = new SPainter("Kanizsa Square",400,400);
16   
17           SCircle dot = new SCircle(75);
18           paintBlueCircle(painter, dot);
19           paintRedCircle(painter, dot);
20           paintGreenCircles(painter, dot);
21   
22           SSquare square = new SSquare(200);
23           paintWhiteSquare(painter, square);
24       }
25   
26       private void paintBlueCircle(SPainter painter, SCircle dot) {
27           painter.mlt(100);
28           painter.mfd(100);
29           painter.setColor(Color.blue);
30           painter.paint(dot);
31           painter.mbk(100);
32           painter.mrt(100);
33       }
34   
35       private void paintRedCircle(SPainter painter, SCircle dot) {
36           painter.mrt(100);
37           painter.mbk(100);
38           painter.setColor(Color.red);
39           painter.paint(dot);
40           painter.mfd(100);
41           painter.mlt(100);
42       }
43   
44       private void paintGreenCircles(SPainter painter, SCircle dot) {
45           painter.mrt(100);
46           painter.mfd(100);
47           painter.setColor(Color.green);
48           painter.paint(dot);
49           painter.mbk(200);
50           painter.mlt(200);
51           painter.paint(dot);
52           painter.mrt(100);
53           painter.mfd(100);
54       }
55   
56       private void paintWhiteSquare(SPainter painter, SSquare square) {
57           painter.setColor(Color.white);
58           painter.paint(square);
59       }
60   
61       // required infrastructure
62       public KanizsaSquare() {
63           paintTheImage();
64       }
65   
66       public static void main(String[] args) {
67           SwingUtilities.invokeLater(new Runnable() {
68               public void run() {
69                   new KanizsaSquare();
70               }
71           });
72       }
73   }