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     * - HELP: show a list of the commands in a dialog message box 
10    * - EXIT: terminate the program 
11    */
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 Interpreter2 {
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("help")) {
42                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | GREEN | YELLOW | HELP | EXIT ");
43               } else if (command.equalsIgnoreCase("exit")) {
44                   miro.end();
45                   System.out.println("Thanks you for viewing the dots ...");
46                   break;
47               } else if (command.equalsIgnoreCase("green")) {
48                   miro.setColor(Color.GREEN);
49                   miro.paint(dot);
50               } else if (command.equalsIgnoreCase("yellow")) {
51                   miro.setColor(Color.YELLOW);
52                   miro.paint(dot);
53               } else {
54                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
55               }
56           }
57       }
58       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
59   
60       public Interpreter2() {
61           interpreter();
62       }
63   
64       public static void main(String[] args) {
65           SwingUtilities.invokeLater(new Runnable() {
66               public void run() {
67                   new Interpreter3();
68               }
69           });
70       }
71   }
72