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   package interpreters;
13   
14   // IMPORTS
15   
16   import painter.SPainter;
17   import shapes.SCircle;
18   
19   import javax.swing.*;
20   import java.awt.*;
21   
22   public class Interpreter2 {
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       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
60       public Interpreter2() {
61           interpreter();
62       }
63       public static void main(String[] args) {
64           SwingUtilities.invokeLater(new Runnable() {
65               public void run() {
66                   new Interpreter2();
67               }
68           });
69       }
70   }
71