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     *  - HELP: show a list of the commands in a dialog message box 
9     *  - EXIT: terminate the program 
10    */
11   
12   package interperpreters;
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 Interpreter1 {
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 ) { command = "exit"; } // 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("help") ) {
40                   JOptionPane.showMessageDialog(null, "Valid commands are: "
41                           + "RED | BLUE | HELP | EXIT ");
42               } else if ( command.equalsIgnoreCase("exit") ) {
43                   miro.end();
44                   System.out.println("Thank you for viewing the dots ... ");
45                   break;
46               } else {
47                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
48                           + command.toUpperCase());
49               }
50   
51           }
52   
53       }
54   
55       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
56   
57       public Interpreter1() {
58           interpreter();
59       }
60        public static void main(String[] args) {
61           SwingUtilities.invokeLater(new Runnable() {
62               public void run() {
63                   new Interpreter1();
64               }
65           });
66        }
67   }
68