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   import painter.SPainter;
17   import shapes.SCircle;
18   
19   public class Interpreter1 {
20   
21       private void interpreter() {
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               } else if (command.equalsIgnoreCase("red")) {
35                   miro.setColor(Color.RED);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("help")) {
38                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | HELP | EXIT ");
39               } else if (command.equalsIgnoreCase("exit")) {
40                   miro.end();
41                   System.out.println("Thanks you for viewing the dots ...");
42                   break;
43               } else {
44                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
45               }
46           }
47       }
48       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
49   
50       public Interpreter1() {
51           interpreter();
52       }
53   
54       public static void main(String[] args) {
55           SwingUtilities.invokeLater(new Runnable() {
56               public void run() {
57                   new Interpreter3();
58               }
59           });
60       }
61   }
62