1    /* 
2      interpreter to paint different dots in a window. 
3     commands the program can recognize: 
4     - BLUE: paint a blue dot 
5     - RED: paint a red dot 
6     - GREEN: paint a green dot 
7     - YELLOW: paint a yellow dot 
8     - HELP: show a list of commands in a dialog message box 
9     - EXIT: terminate the program 
10    */
11   
12   package interpreters;
13   
14   import java.awt.Color;
15   import javax.swing.JOptionPane;
16   import javax.swing.SwingUtilities;
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter2 {
21       private void interpreter() {
22   
23           // 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                           + "BLUE | RED | 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 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   }