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     *  - YELLOW: paint a yellow dot 
8     *  - GREEN: paint a green 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   
18   import javax.swing.*;
19   import java.awt.*;
20   
21   
22   public class Interpreter2 {
23   
24       private void interpreter() {
25   
26           // CREATE OBJECTS TO THINK WITH
27           SPainter miro = new SPainter("Dot Thing", 400,400);
28           miro.setScreenLocation(0,0);
29           SCircle dot = new SCircle(180);
30   
31           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
32           while ( true ) {
33               String command = JOptionPane.showInputDialog(null, "Command?");
34               if ( command == null ) { command = "exit"; } // 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("yellow") ) {
42                   miro.setColor(Color.YELLOW);
43                   miro.paint(dot);
44               } else if ( command.equalsIgnoreCase("green") ) {
45                   miro.setColor(Color.GREEN);
46                   miro.paint(dot);
47               } else if ( command.equalsIgnoreCase("help") ) {
48                   JOptionPane.showMessageDialog(null, "Valid commands are: "
49                           + "RED | BLUE | YELLOW | GREEN | 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: " + command.toUpperCase());
56               }
57           }
58       }
59   
60       //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
61   
62       public Interpreter2() {
63           interpreter();
64       }
65   
66       public static void main(String[] args) {
67           SwingUtilities.invokeLater(new Runnable() {
68               public void run() {
69                   new Interpreter2();
70               }
71           });
72       }
73   
74   }
75