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     *  - GREEN: paint a green dot 
8     *  - YELLOW: paint a yellow dot 
9     *  - HELP: show a list of the commands in a dialog message box 
10    *  - EXIT: terminate the program 
11    */
12   
13   package interpreters;
14   
15   import painter.SPainter;
16   import shapes.SCircle;
17   import javax.swing.*;
18   import java.awt.*;
19   
20   public class Interpreter2 {
21   
22       private void interpreter(){
23   
24           // CREATE OBJECTS TO THINK WITH
25           SPainter miro = new SPainter("Dot Thing" , 400, 400);
26           miro.setScreenLocation(0,0);
27           SCircle dot = new SCircle(180);
28   
29           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
30           while (true) {
31               String command = JOptionPane.showInputDialog(null, "Command?");
32               if (command == null) {
33                   command = "exit";
34               } // user clicked on Cancel
35               if (command.equalsIgnoreCase("blue")) {
36                   miro.setColor(Color.BLUE);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("red")) {
39                   miro.setColor(Color.RED);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("green")) {
42                   miro.setColor(Color.GREEN);
43                   miro.paint(dot);
44               } else if (command.equalsIgnoreCase("yellow")) {
45                   miro.setColor(Color.YELLOW);
46                   miro.paint(dot);
47               } else if (command.equalsIgnoreCase("help")) {
48                   JOptionPane.showMessageDialog(null, "Valid commands are: " +
49                           "RED | BLUE | GREEN | YELLOW | HELP | EXIT ");
50               } else if (command.equalsIgnoreCase("exit")) {
51                   miro.end();
52                   System.out.println("Thank you for viewing the dots ...");
53                   break;
54               } else {
55                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
56                           + command.toUpperCase());
57               }
58           }
59       }
60   
61       //  INFRASTRUCTURE FOR SOME SIMPLE PAINTING
62   
63       public Interpreter2() {
64           interpreter();
65       }
66   
67       public static void main(String[] args) {
68           SwingUtilities.invokeLater(new Runnable() {
69               public void run() {
70                   new Interpreter2();
71               }
72           });
73       }
74   }
75