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