1    /* 
2    Program that paints 300 balloons of six different colors in a blue sky. 
3    It will feature commands. 
4     */
5    
6    package npw;
7    
8    import java.awt.Color;
9    import java.util.Random;
10   import javax.swing.SwingUtilities;
11   import painter.SPainter;
12   import shapes.SCircle;
13   import shapes.SSquare;
14   
15   public class AlternateBalloons {
16   
17       // REQUIRED INFRASTRUCTURE
18   
19       public AlternateBalloons() {
20           paintTheImage();
21       }
22   
23       public static void main(String[] args) {
24           SwingUtilities.invokeLater(new Runnable() {
25               public void run() {
26                   new AlternateBalloons();
27               }
28           });
29       }
30   
31       // THE PAINTER DOING ITS THING
32   
33       private void paintTheImage() {
34           SPainter painter = new SPainter("Alternate Balloons",600,600);
35           paintSky(painter);
36           int nrOfBalloons = 300;
37           paintBalloons(painter,nrOfBalloons);
38       }
39   
40       private void paintBalloons(SPainter painter, int nrOfBalloons) {
41           int i = 1;
42           while (i <= nrOfBalloons){
43               paintOneBalloon(painter);
44               i=i+1;
45           }
46       }
47   
48       private void paintOneBalloon(SPainter painter) {
49           Random rgen = new Random();
50           int rn = rgen.nextInt(6);
51           if (rn == 0) {
52               painter.setColor(randomColor());
53           } else if (rn == 1) {
54               painter.setColor(randomColor());
55           } else if (rn == 2) {
56               painter.setColor(randomColor());
57           } else if (rn == 3) {
58               painter.setColor(randomColor());
59           } else if (rn == 4) {
60               painter.setColor(randomColor());
61           } else {
62               painter.setColor(randomColor());
63           }
64           painter.move();
65           int balloonRadius=30;
66           SCircle balloon = new SCircle(balloonRadius);
67           painter.paint(balloon);
68           painter.setColor(Color.BLACK);
69           painter.draw(balloon);
70       }
71   
72       private Color randomColor() {
73           int rv = (int)(Math.random()*256);
74           int gv = (int)(Math.random()*256);
75           int bv = (int)(Math.random()*256);
76           return new Color(rv,gv,bv);
77       }
78   
79       private void paintSky(SPainter painter) {
80           painter.setColor(Color.BLUE);
81           SSquare sky = new SSquare(2000);
82           painter.paint(sky);
83       }
84   }
85   
86