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 (STATE)
11   
12       private int order;
13       private int top;
14   
15       // THE CONSTRUCTORS
16   
17       public Die() {
18           order = 6;
19           top = (int) ( ( Math.random() * 6 ) + 1);
20       }
21       public Die(int nrOfSides) {
22           order = nrOfSides;
23           top = (int) ( ( Math.random() * nrOfSides ) + 1);
24       }
25   
26       // THE METHODS (BEHAVIOR)
27   
28       public int top() {
29           return top;
30       }
31   
32       public void roll() {
33           top = (int) ( ( Math.random() * order ) + 1);
34       }
35   
36   }