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     * - HELP: show a list of the commands in a dialog message box 
8     * - EXIT: terminate the program 
9     */
10   
11   package interpreters;
12   
13   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   import painter.SPainter;
17   import shapes.SCircle;
18   
19   public class Interpreter1 {
20       private void interpreter() {
21   
22           // CREATE OBJECTS TO THINK WITH
23           SPainter miro = new SPainter("Dot Thing",400,400);
24           miro.setScreenLocation(0,0);
25           SCircle dot = new SCircle(180);
26   
27           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
28           while ( true ) {
29               String command = JOptionPane.showInputDialog(null, "Command");
30               if ( command == null ) { command = "exit"; } // user clicked on Cancel
31               if ( command.equalsIgnoreCase("blue") ) {
32                   miro.setColor(Color.BLUE);
33                   miro.paint(dot);
34               } else if (command.equalsIgnoreCase("red") ) {
35                   miro.setColor(Color.RED);
36                   miro.paint(dot);
37               } else if ( command.equalsIgnoreCase("help") ) {
38                   JOptionPane.showMessageDialog(null,"Valid commands are: "
39                           + "RED | BLUE | HELP | EXIT ");
40               } else if ( command.equalsIgnoreCase("exit") ) {
41                   miro.end();
42                   System.out.println("Thank you for viewing the dots ...");
43                   break;
44               } else {
45                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
46                           + command.toUpperCase());
47               }
48           }
49   
50       }
51   
52   // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
53   
54       public Interpreter1() {
55           interpreter();
56       }
57   
58       public static void main(String[] args) {
59           SwingUtilities.invokeLater(new Runnable() {
60               public void run() {
61                   new Interpreter1();
62               }
63          });
64       }
65   }
66