Java 8 primitive stream to collection mapping methods

Question

Is there any significant difference (in performance or best practices) between those two stream creation methods?

int[] arr2 = {1,2,3,4,5,6};

Arrays.stream(         


        

Answer 1

The second one will effectively use the jvm's integer cache, thus it will be better both in performance, as well as a best practice (do not instantiate boxed types, rather let the vm do that for you).

You could imitate the same behavior if you changed the new Integer(in) with Integer.valueOf(in)