1    /* 
2     *This interpreter is intended to paint different colored dots in a window.* 
3     *The commands that the interpreter can recognize and respond to are: 
4     * - BLUE: paint a blue dot 
5     * - RED: paint a red dot 
6     * - GREEN: paint a green dot 
7     * - YELLOW: paint a yellow dot 
8     * - RANDOM: paint a random color 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 java.awt.Color;
16   import javax.swing.JOptionPane;
17   import javax.swing.SwingUtilities;
18   import painter.SPainter;
19   import shapes.SCircle;
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) {
32                   command = "exit";
33               } //user clicked on Cancel
34               if (command.equalsIgnoreCase("blue")) {
35                   miro.setColor(Color.BLUE);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("red")) {
38                   miro.setColor(Color.RED);
39                   miro.paint(dot);
40               } else if (command.equalsIgnoreCase("green")) {
41                   miro.setColor(Color.GREEN);
42                   miro.paint(dot);
43               } else if (command.equalsIgnoreCase("yellow")) {
44                   miro.setColor(Color.YELLOW);
45                   miro.paint(dot);
46               } else if ( command.equalsIgnoreCase("random") ) {
47                   miro.setColor(randomColor());
48                   miro.paint(dot);
49               } else if ( command.equalsIgnoreCase("help") ) {
50                   JOptionPane.showMessageDialog(null,"Valid commands are: "
51                           + "RED | BLUE | GREEN | YELLOW | RANDOM | HELP | EXIT ");
52               } else if ( command.equalsIgnoreCase("exit") ) {
53                   miro.end();
54                   System.out.println("Thank you for viewing the dots ...");
55                   break;
56               }  else {
57                   JOptionPane.showMessageDialog(null, "Unrecognizable command: "
58                           + command.toUpperCase());
59   
60               }
61           }
62       }
63   
64       private Color randomColor() {
65           int rv = (int)(Math.random()*256);
66           int gv = (int)(Math.random()*256);
67           int bv = (int)(Math.random()*256);
68           return new Color(rv,gv,bv);
69       }
70       //INFRASTRUCTURE FOR SOME SIMPLE PAINTING
71   
72       public Interpreter3() {
73           interpreter();
74       }
75   
76       public static void main(String[] args) {
77           SwingUtilities.invokeLater(new Runnable() {
78               public void run() {
79                   new Interpreter3();
80               }
81           });
82       }
83   }