[concurrency-interest] ConcurrentHashMap + readValueUnderLock

[Kasper Nielsen]

Hi,

Im trying to customize ConcurrentHashMap for my own needs. And I have a 
problem understanding why ValueIterator and HashIterator does not need 
to check for null values (as get does). And possible resort to 
readValueUnderLock when they return an entry/value?

Cheers
   Kasper