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: paint a random 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   
20   import painter.SPainter;
21   import shapes.SCircle;
22   
23   public class Interpreter3 {
24   
25       private void interpreter() {
26   
27           // CREATE OBJECTS TO THINK WITH
28           SPainter miro = new SPainter("Dot Thing" ,400,400);
29           miro.setScreenLocation(0,0);
30           SCircle dot = new SCircle(180);
31   
32           //REPEATEDLY TAKE A COMMAND FROM AN INPUT DIALOG BOX AND INTERPRET IT
33           while (true) {
34               String command = JOptionPane.showInputDialog(null,"Command?");
35               if (command == null) { command = "exit"; } // user clicked on Cancel
36               if (command.equalsIgnoreCase("blue") ) {
37                   miro.setColor(Color.BLUE);
38                   miro.paint(dot);
39               } else if ( command.equalsIgnoreCase("red") ) {
40                   miro.setColor(Color.RED);
41                   miro.paint(dot);
42               } else if ( command.equalsIgnoreCase("green") ) {
43                   miro.setColor(Color.GREEN);
44                   miro.paint(dot);
45               } else if ( command.equalsIgnoreCase("yellow") ) {
46                   miro.setColor(Color.YELLOW);
47                   miro.paint(dot);
48               } else if ( command.equalsIgnoreCase("random") ) {
49                   miro.setColor(randomColor());
50                   miro.paint(dot);
51               } else if ( command.equalsIgnoreCase("help") ) {
52                   JOptionPane.showMessageDialog(null, "Valid commands are: "
53                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
54               } else if ( command.equalsIgnoreCase("exit") ) {
55                   miro.end();
56                   System.out.println("Thank you for viewing the dots ...");
57                   break;
58               } else {
59                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
60                           + command.toUpperCase());
61               }
62           }
63   
64       }
65   
66       private static Color randomColor() {
67           int rv = (int)(Math.random()*256);
68           int gv = (int)(Math.random()*256);
69           int bv = (int)(Math.random()*256);
70           return new Color(rv,gv,bv);
71       }
72   
73       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
74   
75       public Interpreter3() {
76           interpreter();
77       }
78   
79       public static void main(String[] args) {
80           SwingUtilities.invokeLater(new Runnable() {
81               public void run() {
82                   new Interpreter3();
83               }
84           });
85       }
86   
87   }
88   
89   
90   
91