1    /* 
2     *This interpreter is intended to paint different colored dots in a window.* 
3     *The commands that the interpreter can recognize and respond to are: 
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 the 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           //CREATE OBJECTS TO THINK WITH
23           SPainter miro = new SPainter("Dot Thing", 400, 400);
24           miro.setScreenLocation(0, 0);
25           SCircle dot = new SCircle(180);
26   
27           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
28           while (true) {
29               String command = JOptionPane.showInputDialog(null, "Command?");
30               if (command == null) {
31                   command = "exit";
32               } //user clicked on Cancel
33               if (command.equalsIgnoreCase("blue")) {
34                   miro.setColor(Color.BLUE);
35                   miro.paint(dot);
36               } else if (command.equalsIgnoreCase("red")) {
37                   miro.setColor(Color.RED);
38                   miro.paint(dot);
39               } else if (command.equalsIgnoreCase("green")) {
40                   miro.setColor(Color.GREEN);
41                   miro.paint(dot);
42               } else if (command.equalsIgnoreCase("yellow")) {
43                   miro.setColor(Color.YELLOW);
44                   miro.paint(dot);
45               } else if ( command.equalsIgnoreCase("help") ) {
46                   JOptionPane.showMessageDialog(null,"Valid commands are: "
47                           + "RED | BLUE | GREEN | YELLOW | HELP | EXIT ");
48               } else if ( command.equalsIgnoreCase("exit") ) {
49                   miro.end();
50                   System.out.println("Thank you for viewing the dots ...");
51                   break;
52               }  else {
53                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
54                           + command.toUpperCase());
55   
56               }
57           }
58       }
59       //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
60   
61       public Interpreter2() {
62           interpreter();
63       }
64   
65       public static void main(String[] args) {
66           SwingUtilities.invokeLater(new Runnable() {
67               public void run() {
68                   new Interpreter2();
69               }
70           });
71       }
72   }