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 commands in a dialog message box 
8     * -EXIT: terminate the program 
9     */
10   
11   package interpreters;
12   
13   import java.awt.Color;
14   import javax.swing.JOptionPane;
15   import javax.swing.SwingUtilities;
16   
17   import painter.SPainter;
18   import shapes.SCircle;
19   
20   public class Interpreter3 {
21   
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 INTERPET 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("green")) {
35                   miro.setColor(Color.GREEN);
36                   miro.paint(dot);
37               } else if (command.equalsIgnoreCase("yellow")) {
38                   miro.setColor(Color.YELLOW);
39                   miro.paint(dot);
40               } else if (command.equalsIgnoreCase("blue")) {
41                   miro.setColor(Color.BLUE);
42                   miro.paint(dot);
43               } else if (command.equalsIgnoreCase("red")) {
44                   miro.setColor(Color.RED);
45                   miro.paint(dot);
46               } else if (command.equalsIgnoreCase("help")) {
47                   JOptionPane.showMessageDialog(null, "Validc command are: "
48                           + "RED | BLUE | YELLOW | GREEN | RANDOM |HELP | EXIT  ");
49               } else if (command.equalsIgnoreCase("RANDOM")) {
50                   miro.setColor(randomColor());
51                   miro.paint(dot);
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 static 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   
71       // INFRASTRUCTURE FOR SOME SIMPLE PAINTING
72   
73       public Interpreter3() {
74           interpreter();
75       }
76   
77       public static void main(String[] args) {
78           SwingUtilities.invokeLater(new Runnable() {
79               public void run() {
80                   new Interpreter3();
81               }
82           });
83       }
84   }