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     * - RANDOM: paints a random colored dot 
10    * - HELP: show a list of the commands in a dialog message box 
11    * - EXIT: terminate the program 
12    */
13   
14   package interpreters;
15   
16   import java.awt.Color;
17   import javax.swing.JOptionPane;
18   import javax.swing.SwingUtilities;
19   import painter.SPainter;
20   import shapes.SCircle;
21   
22   public class Interpreter3 {
23   
24       private void interpreter() {
25   
26           // Create objects to think with:
27           SPainter miro = new SPainter("Dot Thing" ,400,400);
28           miro.setScreenLocation(0,0);
29           SCircle dot = new SCircle(180);
30   
31           //Repeatedly take a command from an input dialog box and interpret it
32           while (true) {
33               String command = JOptionPane.showInputDialog(null, "Command?");
34               if (command == null) {command = "exit";} //user clicked on cancel
35               if (command.equalsIgnoreCase("blue")) {
36                   miro.setColor(Color.BLUE);
37                   miro.paint(dot);
38               } else if (command.equalsIgnoreCase("red")) {
39                   miro.setColor(Color.RED);
40                   miro.paint(dot);
41               } else if (command.equalsIgnoreCase("green")) {
42                   miro.setColor(Color.GREEN);
43                   miro.paint(dot);
44               } else if (command.equalsIgnoreCase("yellow")) {
45                   miro.setColor(Color.YELLOW);
46                   miro.paint(dot);
47               }else if (command.equalsIgnoreCase("random")) {
48                   miro.setColor(randomColor());
49                   miro.paint(dot);
50               } else if (command.equalsIgnoreCase("help")) {
51                   JOptionPane.showMessageDialog(null, "Valid commands are: "
52                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT");
53               } else if (command .equalsIgnoreCase("exit")) {
54                   miro.end();
55                   System.out.println("Thank you for viewing the dots ...");
56                   break;
57               } else {
58                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
59                           + command.toUpperCase());
60               }
61           }
62   
63       }
64   
65       private static Color randomColor() {
66           int rv = (int)(Math.random()*256);
67           int gv = (int)(Math.random()*256);
68           int bv = (int)(Math.random()*256);
69           return new Color(rv,gv,bv);
70       }
71   
72       //infrastructure for simple painting
73   
74       public Interpreter3() {
75           interpreter();
76       }
77   
78       public static void main(String[] args) {
79           SwingUtilities.invokeLater(new Runnable() {
80               public void run() {
81                   new Interpreter3();
82               }
83           });
84       }
85   }