1    package chance;
2    
3    /* 
4    * Model a die in terms of two properties: 
5    * - order, the number of faces 
6    * - top, the value of the top face 
7     */
8    
9    public class Die {
10       // THE INSTANCE VARIABLES (STATE)
11   
12       private int order;
13       private int top;
14   
15       // THE CONSTRUCTORS
16   
17       public Die()
18       {
19           order = 6;
20           top = (int) ((Math.random() * 6 ) + 1);
21       }
22   
23       public Die(int nrOfSides)
24       {
25           order = nrOfSides;
26           top = (int) ((Math.random() * nrOfSides) + 1);
27       }
28   
29       // THE METHODS (BEHAVIOR)
30   
31       public int top()
32       {
33           return top;
34       }
35   
36       public void roll()
37       {
38           top = (int) ((Math.random() * order) + 1);
39       }
40   }
41