iimport java.util.*;

public class NameSortedSet {
   static final Comparator<Name> NameOrdering = 
                                        new Comparator<Name>() {
            public int compare(Name n1, Name n2) {
                int cmp = n1.firstName().compareTo(n2.firstName() );
                return (cmp != 0 ? cmp : n1.lastName().compareTo(n2.lastName() ));
            }
    };

    public static void main(String[] args) {
        
        SortedSet<Name> names = new TreeSet<Name>(NameOrdering);
        names.add(new Name("Bob", "Travolta"));
        names.add(new Name("John", "Smith"));
        names.add(new Name("Karl", "Ng"));
        names.add(new Name("Jeff", "Smith"));
        names.add(new Name("Tom", "Rich"));
        for(Name n: names)
          System.out.println(n);
          
        System.out.println("\n***Print headset***");
          
        SortedSet<Name> subnames = names.headSet(new Name("Karl", "Ng"));
        for(Name n: subnames)
          System.out.println(n);
          
        System.out.println("\n***Print tailset***");
          
        subnames = names.tailSet(new Name("Karl", "Ng"));
        for(Name n: subnames)
          System.out.println(n);
    }
}