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