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