1    package npw;
2    import java.awt.Color;
3    import javax.swing.SwingUtilities;
4    import painter.SPainter;
5    import shapes.SCircle;
6    import java.util.Random;
7    import shapes.SSquare;
8    public class AlternateBalloons {
9    
10   
11   
12   
13   
14       public AlternateBalloons() {
15           paintTheImage();
16       }
17   
18       public static void main(String[] args) {
19           SwingUtilities.invokeLater(new Runnable() {
20               public void run() {
21                   new AlternateBalloons();
22               }
23   
24   
25           });
26       }
27   
28       private void paintTheImage() {
29   
30           SPainter painter = new SPainter(" Alternate Balloons", 800, 800);
31           paintSky(painter);
32           int nrOfBalloons = 300;
33           paintBalloons(painter, nrOfBalloons);
34   
35       }
36   
37   
38       private void paintSky(SPainter painter) {
39           painter.setColor(Color.blue);
40           SSquare sky = new SSquare(2000);
41           painter.paint(sky);
42   
43   
44       }
45   
46       private void paintBalloons(SPainter painter, int nrOfBalloons) {
47           int i = 1;
48           while (i <= nrOfBalloons) {
49   
50               paintOneBalloon(painter);
51               i = i + 1;
52           }
53       }
54   
55       private void paintOneBalloon(SPainter painter) {
56           Random rgen = new Random();
57           int rn = rgen.nextInt(3);
58           if (rn == 0) {
59   
60   
61               painter.setRandomColor();
62           } else if (rn == 1) {
63   
64   
65               painter.setRandomColor();
66   
67           } else {
68   
69   
70               painter.setRandomColor();
71   
72           }
73   
74   
75           painter.move();
76           int balloonRadius = 30;
77           SCircle balloon = new SCircle(balloonRadius);
78           painter.paint(balloon);
79           painter.setColor(Color.black);
80           painter.draw(balloon);
81   
82   
83       }
84   
85   
86   }
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