How can I convert a Java HashSet to a primitive int array?

Question

I\'ve got a HashSet with a bunch of Integers in it. I want to turn it into an array, but calling

hashset.toArray();
         


        

Answer 1

Try this. Using java 8.

    Set set = new HashSet<>();
    set.add(43);
    set.add(423);
    set.add(11);
    set.add(44);
    set.add(56);
    set.add(422);
    set.add(34);
    int[] arr = set.stream().mapToInt(Integer::intValue).toArray();