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   import javax.swing.JOptionPane;
12   import javax.swing.SwingUtilities;
13   import java.awt.Color;
14   
15   import painter.SPainter;
16   import shapes.SCircle;
17   
18   
19   public class Interpreter1 {
20       private void interpreter() {
21   // CREATE 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   // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
26           while (true) {
27               String command = JOptionPane.showInputDialog(null, "Command?");
28               if (command == null) {
29                   command = "exit";
30               } // user clicked on Cancel
31               if (command.equalsIgnoreCase("blue")) {
32                   miro.setColor(Color.BLUE);
33                   miro.paint(dot);
34               } else if (command.equalsIgnoreCase("red")) {
35                   miro.setColor(Color.RED);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("help")) {
38                   JOptionPane.showMessageDialog(null, "Valid commands are: "
39                           + "RED | BLUE | HELP | EXIT ");
40               } else if (command.equalsIgnoreCase("exit")) {
41                   miro.end();
42                   System.out.println("Thank you for viewing the dots ...");
43                   break;
44               } else {
45                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
46                           + command.toUpperCase());
47               }
48           }
49       }
50   
51       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
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   }