1 package people; 2 3 public interface PersonSpecification { 4 5 6 7 8 9 public String FirstName(); 10 11 12 public String lastName(); 13 14 public int month(); 15 16 public int day(); 17 public int year(); 18 19 public String initials(); 20 21 public boolean isBoomer(); 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 } 40