LinkedHashSet subset of HashSet ?? (K&B bk shows otherwise)

[Vishy Karl]

Hi Friends,
Dan's Q

import java.util.*;
class GFC113 {
  public static void main (String[] args) {
    Object m = new LinkedHashSet();
    System.out.print((m instanceof Collection)+",");
    System.out.print((m instanceof Set)+",");
    System.out.print(m instanceof HashSet);
}}
What is the result of attempting to compile and run the program? 
a.  Prints: false,false,false 
b.  Prints: false,false,true 
c.  Prints: false,true,false 
d.  Prints: false,true,true 
e.  Prints: true,false,false 
f.  Prints: true,false,true 
g.  Prints: true,true,false 
h.  Prints: true,true,true 
i.  None of the above 
  

Answer is h. ie. given as LinkedHashSet is subclass of HashSet.
But in K&B BK. pg. 422 in the collection hierarchy diagram both HashSet and LinkedHashSet are shown derived from Set. So is the diagram wrong ?? (It should have shown the LinkedHashSet as subclass of HashSet)
Kindly confirm.
Thanks,

[Philippe Maquet]

Hi Vishy,
You're correct. Now that class and interface hierarchy chart looks simplified anyway, probably on purpose, as AbstractSet and AbstractCollection are missing.
Regards,
Phil.
[ January 31, 2004: Message edited by: Philippe Maquet ]

[Bert Bates]

I think the diagram is correct, but, on purpose, we only included those interfaces, classes, and relationships that are included in the exam. Should I be embarrassed yet again ? The important concepts for the exam are about Sets, Lists, and Maps, that's what we focused on...
[ January 31, 2004: Message edited by: Bert Bates ]