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   
21       private void interpreter() {
22   
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("help") ) {
39                   JOptionPane.showMessageDialog(null,"Valid commands are: "
40                           + "RED BLUE HELP EXIT");
41               } else if ( command.equalsIgnoreCase("exit") ) {
42                   miro.end();
43                   System.out.println("Thank you for viewing the dots ...");
44                   break;
45               } else {
46                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
47                           + command.toUpperCase());
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 Interpreter3();
62               }
63           });
64       }
65   }
66