1    /* 
2     * This interpreter is intended to paint different colored dots in a window. 
3     * 
4     * the commands that the interpreter can recognize and respond to are: 
5     * - BLUE: paint a blue dot 
6     * - RED: paint a red dot 
7     * - GREEN: paint a green dot 
8     * - YELLOW: paint a yellow dot 
9     * - RANDOM: paint a random colored dot 
10    * - HELP: show a list of the commands in a dialog message box 
11    * - EXIT: terminate the program 
12    */
13   package interpreters;
14   
15   import java.awt.Color;
16   import javax.swing.JOptionPane;
17   import javax.swing.SwingUtilities;
18   import painter.SPainter;
19   import shapes.SCircle;
20   
21   public class Interpreters3 {
22   
23       private void interpreter() {
24           //Create objects to think with
25           SPainter miro = new SPainter("Dot Thing", 400, 400);
26           miro.setScreenLocation(0, 0);
27           SCircle dot = new SCircle(180);
28   
29           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
30           while (true) {
31               String command = JOptionPane.showInputDialog(null, "Command?");
32               if (command == null) {
33                   command = "exit";
34               } //user clicked on cancel
35               if (command.equalsIgnoreCase("blue")) {
36                   miro.setColor(Color.blue);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("red")) {
39                   miro.setColor(Color.red);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("green")) {
42                   miro.setColor(Color.green);
43                   miro.paint(dot);
44               }else if (command.equalsIgnoreCase("yellow")) {
45                   miro.setColor(Color.yellow);
46                   miro.paint(dot);
47               } else if (command.equalsIgnoreCase("random")) {
48                   miro.setColor(randomColor());
49                   miro.paint(dot);
50               } else if (command.equalsIgnoreCase("help")) {
51                   JOptionPane.showMessageDialog(null, "Valid commands are: "
52                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
53               } else if (command.equalsIgnoreCase("exit")) {
54                   miro.end();
55                   System.out.println("Thank you for viewing the dots ... ");
56                   break;
57               } else {
58                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
59                           + command.toUpperCase());
60               }
61           }
62       }
63   
64       private Color randomColor() {
65           int rv = (int) (Math.random()*256);
66           int gv = (int) (Math.random()*256);
67           int bv = (int) (Math.random()*256);
68           return new Color(rv, gv, bv);
69       }
70   
71       //Infrastructure for some simple painting
72   
73       public Interpreters3() {
74           interpreter();
75       }
76   
77       public static void main(String[] args) {
78           SwingUtilities.invokeLater(new Runnable() {
79               public void run() {
80                   new Interpreters3();
81               }
82           });
83       }
84   }