1    /* 
2     *This interpreter is inteded 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   
13   package interpreters;
14   
15   import painter.SPainter;
16   import shapes.SCircle;
17   
18   import javax.swing.*;
19   import java.awt.*;
20   
21   public class Interpreter3 {
22       private void interpreter() {
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("green")) {
39                   miro.setColor(Color.GREEN);
40                   miro.paint(dot);
41               }else if (command.equalsIgnoreCase("yellow")) {
42                   miro.setColor(Color.YELLOW);
43                   miro.paint(dot);
44               }else if (command.equalsIgnoreCase("random")) {
45                   miro.setColor(randomColor());
46                   miro.paint(dot);
47               }else if (command.equalsIgnoreCase("help")) {
48                   JOptionPane.showMessageDialog(null, "Valid commands are: " + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
49               } else if (command.equalsIgnoreCase("exit")) {
50                   miro.end();
51                   System.out.println("Thank you for viewing the dots ...");
52                   break;
53               } else {
54                   JOptionPane.showMessageDialog(null, "Unrecognizable command" + command.toUpperCase());
55               }
56           }
57       }
58   
59       private static Color randomColor() {
60           int rv = (int) (Math.random()*256);
61           int gv = (int) (Math.random()*256);
62           int bv = (int) (Math.random()*256);
63           return new Color (rv,gv,bv);
64       }
65   
66       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
67   
68       public Interpreter3() {
69           interpreter();
70       }
71   
72       public static void main(String[] args) {
73           SwingUtilities.invokeLater(new Runnable() {
74               public  void run() {
75                   new Interpreter3();
76               }
77           });
78       }
79   }
80