1    package npw;
2    
3    import java.awt.Color;
4    import java.util.Random;
5    import javax.swing.SwingUtilities;
6    import painter.SPainter;
7    import shapes.SCircle;
8    import shapes.SSquare;
9    
10   class AlternateBalloons {
11       public AlternateBalloons(){
12           paintTheImage();
13       }
14       public static void main(String[] args) {
15           SwingUtilities.invokeLater(new Runnable() {
16               public void run() {
17                   new AlternateBalloons();
18               }
19           });
20       }
21       private void paintTheImage() {
22           SPainter painter = new SPainter("AlternateBalloons", 600, 600);
23           paintSky(painter);
24           int nrOfBalloons = 300;
25           paintBalloons(painter,nrOfBalloons);
26       }
27       private void paintSky(SPainter painter) {
28           painter.setColor(Color.BLUE);
29           SSquare sky = new SSquare(2000);
30           painter.paint(sky);
31       }
32       private void paintBalloons(SPainter painter, int nrOfBalloons) {
33           int i = 1;
34           while ( i <= nrOfBalloons ) {
35               paintOneBalloon(painter);
36               i = i + 1;
37           }
38       }
39       private void paintOneBalloon(SPainter painter) {
40           Random rgen = new Random();
41           int rn = rgen.nextInt(6);
42           if ( rn == 0 ) {
43               painter.setColor(Color.GREEN);
44           } else if ( rn == 1 ) {
45               painter.setColor(Color.WHITE);
46           } else if (rn == 2) {
47               painter.setColor(Color.YELLOW);
48           }  else if (rn == 3) {
49               painter.setColor(Color.BLACK);
50           }else if (rn == 4) {
51               painter.setColor(Color.RED);
52           }else if (rn == 5){
53               painter.setColor(Color.MAGENTA);
54           }
55           painter.move();
56           int balloonRadius = 30;
57           SCircle balloon = new SCircle(balloonRadius);
58           painter.paint(balloon);
59           painter.setColor(Color.BLACK);
60           painter.draw(balloon);
61       }
62   }