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   
23       private void interpreter() {
24   
25           // CREATE OBJECTS TO THINK WITH
26           SPainter miro = new SPainter("Dot Thing",400,400);
27           miro.setScreenLocation(0,0);
28           SCircle dot = new SCircle(180);
29   
30           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
31           while (true) {
32               String command = JOptionPane.showInputDialog(null,"Command?");
33               if ( command == null ) { command = "exit";} // user clicked on Cancel
34               if ( command.equalsIgnoreCase("blue") ) {
35                   miro.setColor(Color.BLUE);
36                   miro.paint(dot);
37               } else if ( command.equalsIgnoreCase("red") ) {
38                   miro.setColor(Color.RED);
39                   miro.paint(dot);
40               } else if ( command.equalsIgnoreCase("green") ) {
41                   miro.setColor(Color.GREEN);
42                   miro.paint(dot);
43               } else if ( command.equalsIgnoreCase("yellow") ) {
44                       miro.setColor(Color.YELLOW);
45                       miro.paint(dot);
46               } else if ( command.equalsIgnoreCase("help") ) {
47                   JOptionPane.showMessageDialog(null,"Valid commands are: "
48                           + "RED BLUE GREEN YELLOW HELP EXIT");
49               } else if ( command.equalsIgnoreCase("exit") ) {
50                   miro.end();
51                   System.out.println("Thank you for viewing the dots ...");
52                   break;
53               } else {
54                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
55                           + 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 Interpreter3();
70               }
71           });
72       }
73   }
74