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     *  - HELP: show a list of commands in a dialog message box 
8     *  - EXIT: terminate the program 
9     */
10   package interpreters;
11   
12   import java.awt.Color;
13   import javax.swing.JOptionPane;
14   import javax.swing.SwingUtilities;
15   import painter.SPainter;
16   import shapes.SCircle;
17   
18   public class Interpreter1 {
19   
20       private void interpreter() {
21   
22           // CREATE OBJECTS TO THINK WITH
23           SPainter miro = new SPainter("Dot Thing", 400, 400);
24           miro.setScreenLocation(0,0);
25           SCircle dot = new SCircle(180);
26   
27           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
28           while ( true ) {
29               String command = JOptionPane.showInputDialog(null,"Command?");
30               if (command == null) { command = "exit"; } // user clicked on Cancel
31               if (command.equalsIgnoreCase("blue")) {
32                   miro.setColor(Color.BLUE);
33                   miro.paint(dot);
34   
35               } else if (command.equalsIgnoreCase("red")) {
36                   miro.setColor(Color.RED);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("help")) {
39                   JOptionPane.showMessageDialog(null, "Valid commands are: "
40                           + "RED | BLUE | HELP | EXIT");
41               } else if (command.equalsIgnoreCase("exit")) {
42                   miro.end();
43                   System.out.println("Thank you for viewing the dots ...");
44                   break;
45               } else {
46                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
47                   + command.toUpperCase());
48               }
49           }
50       }
51   
52       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
53   
54       public Interpreter1() {
55           interpreter();
56       }
57   
58       public static void main(String[] args) {
59           SwingUtilities.invokeLater(new Runnable() {
60               @Override
61               public void run() {
62                   new Interpreter1();
63               }
64           });
65   
66       }
67   
68   }
69