Why initialize HashSet<>(0) to zero?

Question

I love a HashSet<>() and use this eagerly while initializing this with the default constructor:

Set users = new HashSet<>();
         


        

Answer 1

The default initial capacity is 16, so by passing in 0 you may save a few bytes of memory if you end up not putting anything in the set.

Other than that there is no real advantage; when you pass 0 the set is created with a capacity of 1 and as soon as you add something it will have to be resized.