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       public Die(int nrOfSides) {
23           order = nrOfSides;
24           top = (int) ((Math.random() * nrOfSides) + 1);
25       }
26   
27       // THE METHODS (BEHAVIOR)
28   
29       public int top() {
30           return top;
31       }
32   
33       public void roll() {
34           top = (int) ((Math.random() * order) + 1);
35       }
36   }
37