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     * -YELLOW: paint a yellow dot 
8     * -GREEN: paint a green dot 
9     * -RANDOM: paint 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 | 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       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   
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       }
85   }
86