1    /* 
2     * Program that paints 300 red, yellow, orange, white, green, and cyan balloons in a blue sky. 
3     */
4    
5    package npw;
6    
7    import java.awt.Color;
8    import java.util.Random;
9    import javax.swing.SwingUtilities;
10   import painter.SPainter;
11   import shapes.SCircle;
12   import shapes.SSquare;
13   
14   public class AlternateBalloons {
15   
16       public AlternateBalloons() {
17           paintTheImage();
18       }
19   
20       public static void main(String[] args) {
21           SwingUtilities.invokeLater(new Runnable() {
22               @Override
23               public void run() {
24                   new AlternateBalloons();
25               }
26           });
27       }
28   
29       private void paintTheImage() {
30           SPainter painter = new SPainter("Balloons" , 600 , 600 );
31           paintSky(painter);
32           int nrOfBalloons = 300;
33           paintBalloons(painter,nrOfBalloons);
34       }
35   
36       private void paintBalloons(SPainter painter, int nrOfBalloons) {
37           int i = 1;
38           while (i <= nrOfBalloons) {
39               paintOneBalloon(painter);
40               i = i + 1;
41           }
42       }
43       private void paintSky(SPainter painter) {
44           painter.setColor(Color.BLUE);
45           SSquare sky = new SSquare(2000);
46           painter.paint(sky);
47       }
48   
49   
50       private void paintOneBalloon(SPainter painter) {
51           Random rgen = new Random();
52           int rn = rgen.nextInt(3);
53           if ( rn == 0 ) {
54               painter.setColor(Color.RED);
55           } else if ( rn == 1 ) {
56               painter.setColor(Color.ORANGE);
57           } else if ( rn == 2 ){
58               painter.setColor(Color.YELLOW);
59           } else if ( rn == 3 ) {
60               painter.setColor(Color.GREEN);
61           } else if ( rn == 4 ) {
62               painter.setColor(Color.WHITE);
63           } else {
64               painter.setColor(Color.CYAN);
65           }
66           painter.move();
67           int balloonRadius = 30;
68           SCircle balloon = new SCircle(balloonRadius);
69           painter.paint(balloon);
70           painter.setColor(Color.BLACK);
71           painter.draw(balloon);
72       }
73   }
74