1    package npw;
2    
3    import painter.SPainter;
4    import shapes.SSquare;
5    
6    import javax.swing.*;
7    import java.awt.*;
8    import java.util.Random;
9    import java.util.Scanner;
10   
11   public class Stella {
12       public static void main(String[] args) {
13           SwingUtilities.invokeLater(new Runnable() {
14               @Override
15               public void run() {
16                   new Stella();
17               }
18           });
19       }
20       public Stella(){
21           paintTheImage();
22       }
23       private void paintTheImage() {
24           SPainter klee = new SPainter("Stella", 800, 800);
25           int sideLength = 700;
26           SSquare square = new SSquare(sideLength);
27           int nrOfSquares = getNumber();
28           double shrink = (square.side()/nrOfSquares);
29           Color c1 = randomColor();
30           Color c2 = randomColor();
31           paintSquares(klee, square, nrOfSquares, shrink, c1, c2);
32   
33       }
34   
35       private void paintSquares(SPainter klee, SSquare square, int nrOfSquares, double shrink, Color c1, Color c2) {
36           int i = 0;
37           while (i<=nrOfSquares){
38               if (i % 2 == 0) {
39                   klee.setColor(c2);
40               } else {
41                   klee.setColor(c1);
42               }
43               klee.paint(square);
44               square.shrink(shrink);
45               i++;
46           }
47       }
48   
49       private static int getNumber() {
50           String nss = JOptionPane.showInputDialog(null, "The number of concentric squares: " + "?");
51           Scanner scanner = new Scanner(nss);
52           return scanner.nextInt();
53       }
54       private static Color randomColor() {
55           Random rgen = new Random();
56           int r = rgen.nextInt(256);
57           int g = rgen.nextInt(256);
58           int b = rgen.nextInt(256);
59           return new Color(r, g, b);
60       }
61   }
62