1    /* 
2     *Person functionality 
3     */
4    
5    package people;
6    
7    public interface PersonSpecification {
8    
9        public String firstName();
10   
11       public String lastName();
12   
13       public int month();
14   
15       public int day();
16   
17       public int year();
18   
19       public String initials();
20   
21       public boolean isBoomer();
22   
23   
24   }