import java.util.*;

public class NameSortedMap {
   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) {
        
        SortedMap<Name,NameProperty> users = new TreeMap<Name,NameProperty>(NameOrdering);
        users.put(new Name("Bob", "Travolta"), new NameProperty("bob@travolta.com", "Gklavani 37, 1st floor") );
        users.put(new Name("John", "Smith"), new NameProperty("john@smith.com", "Gklavani 37, 2nd floor") );
        users.put(new Name("Karl", "Ng"), new NameProperty("karl@ng.com", "Gklavani 37, 3rd floor") );
        users.put(new Name("Jeff", "Smith"), new NameProperty("jeff@smith.com", "Gklavani 37, 4th floor") );
        users.put(new Name("Tom", "Rich"), new NameProperty("tom@rich.com", "Gklavani 37, 5tht floor") );
        for(Map.Entry<Name,NameProperty> u: users.entrySet())
          System.out.println(u);
          
        System.out.println("\n***Print headmap***");
          
        SortedMap<Name,NameProperty> subusers = users.headMap(new Name("Karl", "Ng"));
        for(Map.Entry<Name,NameProperty> u: subusers.entrySet())
          System.out.println(u);
          
        System.out.println("\n***Print tailmap***");
          
        subusers = users.tailMap(new Name("Karl", "Ng"));
        for(Map.Entry<Name,NameProperty> u: subusers.entrySet())
          System.out.println(u);
    }
}