1    
2    /* 
3     * This interpreter is intended to paint different colored dots in a window 
4     * 
5     * The commands that the interpreter can recognize and respond to are: 
6     *  - BLUE: paint a blue dot 
7     *  - RED: paint a red dot 
8     *  - GREEN: paint a green dot 
9     *  - YELLOW: paint a yellow dot 
10    *  - HELP: show a list of the commands in a dialog message box 
11    *  - EXIT: terminate the program 
12    */
13   
14   package interperpreters;
15   
16   import java.awt.Color;
17   import javax.swing.JOptionPane;
18   import javax.swing.SwingUtilities;
19   import painter.SPainter;
20   import shapes.SCircle;
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("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       }
62   
63       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
64   
65       public Interpreter2() {
66           interpreter();
67       }
68       public static void main(String[] args) {
69           SwingUtilities.invokeLater(new Runnable() {
70               public void run() {
71                   new Interpreter2();
72               }
73           });
74       }
75   }
76