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   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   import painter.SPainter;
17   import shapes.SCircle;
18   public class interpreter2 {
19       private void interpreter() {
20   // CREATE OBJECTS TO THINK WITH
21           SPainter miro = new SPainter("Dot Thing",400,400);
22           miro.setScreenLocation(0,0);
23           SCircle dot = new SCircle(180);
24   // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
25           while ( true ) {
26               String command = JOptionPane.showInputDialog(null,"Command?");
27               if ( command == null ) { command = "exit"; } // user clicked on Cancel
28               if ( command.equalsIgnoreCase("blue") ) {
29                   miro.setColor(Color.BLUE);
30                   miro.paint(dot);
31   
32               } else if ( command.equalsIgnoreCase("red") ) {
33                   miro.setColor(Color.RED);
34                   miro.paint(dot);
35   
36               } else if ( command.equalsIgnoreCase("yellow") ) {
37                   miro.setColor(Color.YELLOW);
38                   miro.paint(dot);
39   
40               } else if ( command.equalsIgnoreCase("green") ) {
41                   miro.setColor(Color.GREEN);
42                   miro.paint(dot);
43   
44               } else if ( command.equalsIgnoreCase("help") ) {
45                   JOptionPane.showMessageDialog(null,"Valid commands are: "
46                           + "RED | GREEN | BLUE | YELLOW | HELP | EXIT ");
47               } else if ( command.equalsIgnoreCase("exit") ) {
48                   miro.end();
49                   System.out.println("Thank you for viewing the dots ...");
50                   break;
51               } else {
52                   JOptionPane.showMessageDialog(null, "Unrecognizable command: ");
53   
54   
55               }
56           }
57       }
58       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
59       public interpreter2() {
60           interpreter();
61       }
62       public static void main(String[] args) {
63           SwingUtilities.invokeLater(new Runnable() {
64               public void run() {
65                   new interpreter2();
66               }
67           });
68       }
69   }