Question

In Eclipse debugger variables‘s view , im looking at aHashSet and it has a map element which contains a KeySet and a Table but what puzzles me is that this table contains many null references in it , so i want to know what does table represent and what may cause having these many null references ?

because if those are the values in my HashSet they shouldnt many null references cause its set (Sets do not contain duplicate values)

thanks for any hint .

Answer 1

The null references are just implementation detail. HashSets are implemented by dividing the elements of the sets into many “buckets” and the null references just represent empty buckets. No problem for you.