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   
12   package interpreters;
13   
14   import java.awt.Color;
15   import javax.swing.JOptionPane;
16   import javax.swing.SwingUtilities;
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter1
21   {
22       private void interpreter()
23       {
24           // CREATE OBJECTS TO THINK WITH
25           SPainter miro = new SPainter("Dot Thing", 400, 400);
26           miro.setScreenLocation(0,0);
27           SCircle dot = new SCircle(180);
28   
29           // REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
30           while(true)
31           {
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               }
38               else if (command.equalsIgnoreCase("red"))
39               {
40                   miro.setColor(Color.RED);
41                   miro.paint(dot);
42               }
43               else if (command.equalsIgnoreCase("help"))
44               {
45                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | HELP | EXIT ");
46               }
47               else if (command.equalsIgnoreCase("exit"))
48               {
49                   miro.end();
50                   System.out.println("Thank you for viewing the dots ...");
51                   break;
52               }
53               else
54               {
55                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
56                   + command.toUpperCase());
57               }
58   
59           }
60       }
61   
62       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
63   
64       public Interpreter1()
65       {
66           interpreter();
67       }
68   
69       public static void main(String[] args)
70       {
71           SwingUtilities.invokeLater(new Runnable() {
72               public void run() {
73                   new Interpreter1();
74               }
75           });
76       }
77   }
78