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   package interpreters;
11   
12   import java.awt.Color;
13   import javax.swing.JOptionPane;
14   import javax.swing.SwingUtilities;
15   import painter.SPainter;
16   import shapes.SCircle;
17   
18   public class Interpreter1 {
19   
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: " + "RED | BLUE | HELP | EXIT ");
39               } else if ( command.equalsIgnoreCase("exit") ) {
40                   miro.end();
41                   System.out.println("Thank you for viewing the dots ...");
42                   break;
43               } else {
44                   JOptionPane.showMessageDialog(null, "Unrecognizable command: " + command.toUpperCase());
45               }
46           }
47       }
48   
49       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
50   
51       public Interpreter1() {
52           interpreter();
53       }
54   
55       public static void main(String[] args) {
56           SwingUtilities.invokeLater(new Runnable() {
57               public void run() {
58                   new Interpreter1();
59               }
60           });
61       }
62   }