1    /* 
2    * Program that paints 300 balloons of random colors in a blue sky. 
3    * It will feature commands to ramdomcolor method 
4     */
5    package npw;
6    
7    
8    import painter.SPainter;
9    import shapes.SCircle;
10   import shapes.SSquare;
11   
12   import javax.swing.*;
13   import java.awt.*;
14   import java.util.Random;
15   
16   public class AlternateBalloons {
17       //Required infrastructure
18   
19       public AlternateBalloons() {
20           paintTheImage();
21   
22       }
23   
24       public static void main(String[] args) {
25           SwingUtilities.invokeLater(new Runnable() {
26               public void run() {
27                   new AlternateBalloons();
28               }
29           });
30       }
31   
32       //The Painter Doing Its Thing
33       private void paintTheImage() {
34           SPainter painter = new SPainter("AlternateBalloons", 600, 600);
35           paintSky(painter); // ask Intellij to generate the stub
36           int nrOfBalloons = 300;
37           paintBalloons(painter, nrOfBalloons); // ask Intellij to generate the stub
38       }
39   
40       private void paintSky(SPainter painter) {
41           painter.setColor(Color.BLUE);
42           SSquare sky = new SSquare(2000);
43           painter.paint(sky);
44   
45       }
46   
47       private void paintBalloons(SPainter painter, int nrOfBalloons) {
48           int i = 1;
49           while (i <= nrOfBalloons) {
50               paintOneBalloon(painter); //ask Intellij to generate the stub
51               i = i + 1;
52   
53           }
54       }
55   
56       private void paintOneBalloon(SPainter painter) {
57           Random rgen = new Random();
58           int rn = rgen.nextInt(6);
59           if (rn == 0) {
60               painter.setColor(randomColor());
61           } else if (rn == 1) {
62               painter.setColor(randomColor());
63           } else if (rn == 2) {
64               painter.setColor(randomColor());
65           } else if (rn == 3) {
66               painter.setColor(randomColor());
67           } else if (rn == 4) {
68               painter.setColor(randomColor());
69           } else {
70               painter.setColor(randomColor());
71           }
72           painter.move();
73           int balloonsRadius = 30;
74           SCircle balloon = new SCircle(balloonsRadius);
75           painter.paint(balloon);
76           painter.setColor(Color.BLACK);
77           painter.draw(balloon);
78       }
79   
80       private static Color randomColor() {
81   
82           int rv = (int) (Math.random() * 256);
83           int gv = (int) (Math.random() * 256);
84           int bv = (int) (Math.random() * 256);
85           return new Color(rv, gv, bv);
86       }
87   }
88   
89