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 painter.SPainter;
16   import shapes.SCircle;
17   
18   import javax.swing.*;
19   import java.awt.*;
20   
21   public class Interpreter2 {
22   
23       private void interpreter() {
24   
25           // CREATE OBJECTS TO THINK WITH
26           SPainter goku = new SPainter("Dot Thing", 400, 400);
27           goku.setScreenLocation(0, 0);
28           SCircle dot = new SCircle(180);
29   
30           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
31           while (true) {
32               String command = JOptionPane.showInputDialog(null, "Command?");
33               if ( command == null) { command = "exit"; } // user clicked on Cancel
34               if ( command.equalsIgnoreCase("blue")) {
35                   goku.setColor(Color.BLUE);
36                   goku.paint(dot);
37               } else if ( command.equalsIgnoreCase("red")) {
38                   goku.setColor(Color.RED);
39                   goku.paint(dot);
40               } else if ( command.equalsIgnoreCase("green")) {
41                   goku.setColor(Color.GREEN);
42                   goku.paint(dot);
43               } else if ( command.equalsIgnoreCase("yellow")) {
44                   goku.setColor(Color.YELLOW);
45                   goku.paint(dot);
46               } else if (command.equalsIgnoreCase("help")) {
47                   JOptionPane.showMessageDialog(null, "Valid commands are: "
48                           + "RED | BLUE | GREEN | YELLOW | HELP | EXIT ");
49               } else if (command.equalsIgnoreCase("exit")) {
50                   goku.end();
51                   System.out.println("Thank you for viewing the dots ...");
52                   break;
53               } else {
54                   JOptionPane.showMessageDialog(null, "unrecognizable command: "
55                           + command.toUpperCase());
56               }
57           }
58       }
59   
60       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
61   
62       public Interpreter2() {
63           interpreter();
64       }
65   
66       public static void main(String[] args) {
67           SwingUtilities.invokeLater(new Runnable() {
68               public void run() {
69                   new Interpreter2();
70               }
71           });
72       }
73   
74   }
75   
76