Does adding a duplicate value to a HashSet/HashMap replace the previous value

Question

Please consider the below piece of code:

HashSet hs = new HashSet();
hs.add(\"hi\"); -- (1)
hs.add(\"hi\"); -- (2)

hs.size() w

Answer 1

In the case of HashMap, it replaces the old value with the new one.

In the case of HashSet, the item isn't inserted.