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     - HELP: show a list of commands in a dialog message box 
7     - EXIT: terminate the program 
8     */
9    
10   package interpreters;
11   
12   import java.awt.Color;
13   import javax.swing.JOptionPane;
14   import javax.swing.SwingUtilities;
15   import painter.SPainter;
16   import shapes.SCircle;
17   
18   public class Interpreter1 {
19       private void interpreter() {
20   
21           // objects to think with
22           SPainter miro = new SPainter("Dot Thing",400,400);
23           miro.setScreenLocation (0,0);
24           SCircle dot = new SCircle(180);
25   
26           // repeatedly take a command from an input dialog box and interpret it
27           while (true) {
28               String command = JOptionPane.showInputDialog(null, "Command?");
29               if (command == null) {command = "exit";} //user clicked on Cancel
30               if (command.equalsIgnoreCase("blue")) {
31                   miro.setColor(Color.blue);
32                   miro.paint(dot);
33               } else if (command.equalsIgnoreCase("red")) {
34                   miro.setColor(Color.red);
35                   miro.paint(dot);
36               } else if (command.equalsIgnoreCase("help")) {
37                   JOptionPane.showMessageDialog(null, "Valid commands are: "
38                       + "RED | BLUE | HELP | EXIT");
39               } else if (command.equalsIgnoreCase("exit")) {
40                   miro.end();
41                   System.out.println("Thank you for viewing the dots ...");
42                   break;
43               } else {
44                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
45                           + command.toUpperCase());
46               }
47       }
48   }
49   
50   // infrastructure for painting
51   
52       public Interpreter1() {
53           interpreter();
54       }
55   
56       public static void main(String[] args) {
57           SwingUtilities.invokeLater(new Runnable() {
58               public void run() {
59                   new Interpreter1();
60               }
61           });
62       }
63   }