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 the commands in a dialog message box 
8     * - EXIT: terminate the program 
9     */
10   
11   package interpreters;
12   
13   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter1 {
21   
22       private void interpreter() {
23   
24           // CREATE OBJECTS TO THINK WITH
25           SPainter goku = new SPainter("Dot Thing", 400, 400);
26           goku.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                   goku.setColor(Color.BLUE);
37                   goku.paint(dot);
38               } else if (command.equalsIgnoreCase("red")) {
39                   goku.setColor(Color.RED);
40                   goku.paint(dot);
41               } else if (command.equalsIgnoreCase("help")) {
42                   JOptionPane.showMessageDialog(null, "Valid commands are: "
43                           + "RED | BLUE | HELP | EXIT ");
44               } else if (command.equalsIgnoreCase("exit")) {
45                   goku.end();
46                   System.out.println("Thank you for viewing the dots ...");
47                   break;
48               } else {
49                   JOptionPane.showMessageDialog(null, "unrecognizable command: "
50                           + command.toUpperCase());
51               }
52           }
53       }
54   
55       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
56   
57       public Interpreter1() {
58           interpreter();
59       }
60   
61       public static void main(String[] args) {
62           SwingUtilities.invokeLater(new Runnable() {
63               public void run() {
64                   new Interpreter1();
65               }
66           });
67       }
68   
69   }
70   
71