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 lsit of commands in a dialog message box 
8     * -EXIT; terminate the program 
9     */
10   
11   
12   package interpreters;
13   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   import painter.SPainter;
17   import shapes.SCircle;
18   
19   
20   public class Interpreter1 {
21   
22       private void interpreter() {
23   
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: "
43                           + "RED | BLUE | HELP | EXIT ");
44               } else if (command.equalsIgnoreCase("exit")) {
45                   miro.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   
56   
57       }
58       //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
59   
60       public Interpreter1() {
61           interpreter();
62       }
63   
64       public static void main(String[] args) {
65           SwingUtilities.invokeLater(new Runnable() {
66               public void run() {
67                   new Interpreter1();
68               }
69           });
70       }
71   }
72   
73   
74