How to sort a HashSet?

For lists, we use the Collections.sort(List) method. What if we want to sort a HashSet?


A HashSet does not guarantee any order of its elements. If you need this guarantee, consider using a TreeSet to hold your elements.

However if you just need your elements sorted for this one occurrence, then just temporarily create a List and sort that:

Set<?> yourHashSet = new HashSet<>();


List<?> sortedList = new ArrayList<>(yourHashSet);