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   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           // Create objects to "think" with.
21           SPainter gage = new SPainter("Dot thing", 400, 400);
22           gage.setScreenLocation(0, 0);
23           SCircle dot = new SCircle(180);
24   
25           // Repeatedly takes a command from an input dialog box and interpret it.
26           while (true) {
27               String command = JOptionPane.showInputDialog(null, "Command?");
28               if (command == null) {command = "exit";} // User clicks "Cancel" prompt
29               if (command.equalsIgnoreCase("blue")) {
30                   gage.setColor(Color.BLUE);
31                   gage.paint(dot);
32               } else if (command.equalsIgnoreCase("red")) {
33                   gage.setColor(Color.RED);
34                   gage.paint(dot);
35               } else if (command.equalsIgnoreCase("help")) {
36                   JOptionPane.showMessageDialog(null,"Valid commands are: "
37                       + "RED | BLUE | HELP | EXIT");
38               } else if (command.equalsIgnoreCase("exit")) {
39                   gage.end();
40                   System.out.println("Thank you for viewing the dots program.");
41                   break;
42               } else {
43                   JOptionPane.showMessageDialog(null, "Unrecognizable command:"
44                       + command.toUpperCase());
45                   }
46               }
47           }
48       //Infrastructure for simple painting
49       public Interpreter1() {
50           interpreter();
51       }
52       public static void main(String[] args) {
53           SwingUtilities.invokeLater(new Runnable() {
54               public void run() {
55                   new Interpreter1();
56               }
57           });
58       }
59   }