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 
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   
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) {
32                   command = "exit";
33               } //user clicked on cancel
34               if (command.equalsIgnoreCase("blue"))
35               {
36                   miro.setColor(Color.BLUE);
37                   miro.paint(dot);
38               } else if(command.equalsIgnoreCase("red"))
39               {
40                   miro.setColor(Color.RED);
41                   miro.paint(dot);
42               } else if(command.equalsIgnoreCase("help"))
43               {
44                   JOptionPane.showMessageDialog(null, "Valid commands are: "
45                           + "RED | BLUE | HELP | EXIT ");
46               } else if(command.equalsIgnoreCase("exit"))
47               {
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 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   }