1    /* 
2     * Program that paints 300 balloons of 6 different "nameless" colors in a blue sky. 
3     * Each balloon has a radius of 30. 
4     * It will feature commands. 
5     */
6    
7    package npw;
8    
9    import java.awt.Color;
10   import java.util.Random;
11   import javax.swing.SwingUtilities;
12   import painter.SPainter;
13   import shapes.SCircle;
14   import shapes.SSquare;
15   
16   public class AlternateBalloons {
17   
18       // REQUIRED INFRASTRUCTURE
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       private void paintTheImage() {
33           SPainter painter = new SPainter("Alternate Balloons", 600, 600);
34           paintSky(painter); //ask IntelliJ to generate the stub
35           int nrOfBalloons = 300; //300 balloons now
36           paintBalloons(painter, nrOfBalloons); //ask IntelliJ to generate the stub
37       }
38   
39       private void paintSky(SPainter painter) { //We still want the sky blue, so keep this
40           painter.setColor(Color.BLUE);
41           SSquare sky = new SSquare(2000);
42           painter.paint(sky);
43       }
44   
45       private void paintBalloons(SPainter painter, int nrOfBalloons) {
46           int i = 1;
47           //Create 6 random "nameless" colors to paint balloons with
48           Color color1 = randomColor();
49           Color color2 = randomColor();
50           Color color3 = randomColor();
51           Color color4 = randomColor();
52           Color color5 = randomColor();
53           Color color6 = randomColor();
54           while ( i <= nrOfBalloons ) { //counter controlled loop (has a header, we know how many items it will use - 300)
55               paintOneBalloon(painter, color1, color2, color3, color4, color5, color6); //pass the 6 nameless colors
56               i = i + 1;
57           }
58       }
59   
60       //Tell method to expect painter and 6 nameless colors
61       private void paintOneBalloon(SPainter painter, Color color1, Color color2, Color color3, Color color4, Color color5, Color color6) {
62           Random rgen = new Random();
63           int rn = rgen.nextInt(6);
64   
65           if ( rn == 0 ) {
66               painter.setColor(color1);
67           } else if ( rn == 1 ) {
68               painter.setColor(color2);
69           } else if ( rn == 2)  {
70               painter.setColor(color3);
71           } else if ( rn == 3 ) {
72               painter.setColor(color4);
73           } else if (rn == 4 ) {
74               painter.setColor(color5);
75           } else {
76               painter.setColor(color6);
77           }
78   
79           painter.move();
80           int balloonRadius = 30;
81           SCircle balloon = new SCircle(balloonRadius);
82           painter.paint(balloon);
83           painter.setColor(Color.BLACK);
84           painter.draw(balloon);
85       }
86   
87       private static Color randomColor() {
88           int rv = (int)(Math.random()*256);
89           int gv = (int)(Math.random()*256);
90           int bv = (int)(Math.random()*256);
91           return new Color(rv, gv, bv);
92       }
93   }