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    package chance;
7    
8    public class Die {
9        // THE INSTANCE VARIABLES (STATE)
10       private int order;
11       private int top;
12   
13       // THE CONSTRUCTORS
14       public Die() {
15            order = 6;
16            top = (int) ((Math.random() * 6) + 1);
17       }
18   
19       public Die(int nrOfSides) {
20            order = nrOfSides;
21            top = (int) ((Math.random() * nrOfSides) + 1);
22       }
23   
24       // THE METHODS (BEHAVIOR)
25       public int top() {
26           return top;
27       }
28   
29       public void roll() {
30             top = (int) ((Math.random() * order) + 1);
31       }
32   }
33   
34   
35