Replacing a HashSet Java member

Question

I have Set of that structure. I do not have duplicates but when I call: set.add(element) -> and there is already exact element I would like the old to be replac

Answer 1

If the set already contains an element that equals() the element you are trying to add, the new element won't be added and won't replace the existing element. To guarantee that the new element is added, simply remove it from the set first:

set.remove(aWordInfo);
set.add(aWordInfo);