1    package NPW;
2    
3    import java.awt.Color;
4    import java.util.Random;
5    import java.util.Scanner;
6    import javax.swing.JOptionPane;
7    import javax.swing.SwingUtilities;
8    
9    import painter.SPainter;
10   import shapes.SSquare;
11   
12   public class Number2 {
13   
14       // The solution to the graphical problem.
15       private void paintTheImage() {
16           // Get the input information from the user.
17           int nrOfRows = getNumber("rows");
18           int nrOfColumns = getNumber("columns");
19           int sizeOfSquare = getNumber("square side length");
20           // Establish the painter.
21           int height = nrOfRows * sizeOfSquare;
22           int width = nrOfColumns * sizeOfSquare;
23           SPainter miro = new SPainter("Number 2",width+50,height+50);
24           miro.setBrushWidth(4);
25           SSquare square = new SSquare(sizeOfSquare);
26           // Paint the rectangles.
27           paintRectangle(miro,square,nrOfRows,nrOfColumns);
28       }
29   
30       private static int getNumber(String prompt) {
31           String nss = JOptionPane.showInputDialog(null,prompt+"?");
32           Scanner scanner = new Scanner(nss);
33           return scanner.nextInt();
34       }
35   
36       private static void paintRectangle(SPainter miro, SSquare square,
37                                          int nrOfRows, int nrOfColumns) {
38           // Position the painter to paint the rectangle of squares.
39           miro.mlt(((nrOfColumns-1)/2.0) * square.side());
40           miro.mbk(((nrOfRows-1)/2.0) * square.side());
41           // Paint the rectangle of squares.
42           int i = 1;
43           while ( i <= nrOfRows) {
44               paintOneRow(miro,nrOfColumns,square);
45               miro.mfd(square.side());
46               i = i + 1;
47           }
48           // Make the method invariant with respect to painter position.
49           miro.mrt(((nrOfColumns-1)/2.0) * square.side());
50           miro.mfd(((nrOfRows-1)/2.0) * square.side());
51       }
52   
53       private static void paintOneRow(SPainter miro, int nrOfColumns, SSquare square) {
54           int i = 1;
55           while ( i <= nrOfColumns ) {
56               paintOneSquare(miro,square);
57               miro.mrt(square.side());
58               i = i + 1;
59           }
60           miro.mlt(nrOfColumns*square.side());
61       }
62   
63       private static void paintOneSquare(SPainter miro, SSquare square) {
64           //Add two instructions
65           square.s2();
66           miro.setColor(randomColor());
67           miro.paint(square);
68           miro.setColor(Color.BLACK);
69           miro.draw(square);
70           square.x2();
71       }
72       private static Color randomColor() {
73           Random rgen = new Random();
74           int r = rgen.nextInt(256);
75           int g = rgen.nextInt(256);
76           int b = rgen.nextInt(256);
77           return new Color(r,b,g);
78       }
79   
80       public Number2(){
81           paintTheImage();
82       }
83   
84       public static void main(String[] args){
85           SwingUtilities.invokeLater(new Runnable() {
86               @Override
87               public void run() {
88                   new Number2();
89               }
90           });
91       }
92   }
93