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       // the instance variables
11       private int order;
12       private int top;
13   
14       // the constructors
15       public Die() {
16           order = 6;
17           top = (int) ((Math.random()*6)+1);
18       }
19   
20       public Die(int nrOfSides) {
21           order = nrOfSides;
22           top = (int) ((Math.random()*nrOfSides)+1);
23       }
24   
25       // the methods (behavior)
26       public int top() {
27           return top;
28       }
29   
30       public void roll() {
31           top = (int)((Math.random()*order)+1);
32       }
33   }
34