1    /* 
2    *Person functionality 
3    * is declaring the methods but does not use them 
4    * there is no main method so it can not run this code(building block code) 
5     */
6    package people;
7    
8    public interface PersonSpecification {
9        public String firstName();
10       public String lastName();
11       public int month();
12       public  int day();
13       public int year();
14       public String initials();
15       public boolean isBoomer();
16   }
17