On Thu, 13 Oct 2022 21:46:15 GMT, ExE Boss <d...@openjdk.org> wrote:
>> Nope, there'd be a compilation error
>
> It'll work fine if an unchecked cast is used:
> Suggestion:
>
> @SuppressWarnings("unchecked")
> Comparator<Map.Entry<K, V>> entryComparator = treeComparator ==
> null ?
> (Comparator) Map.Entry.comparingByKey()
> Map.Entry.comparingByKey(treeComparator);
> return entryComparator;
>
>
> This also ensures that when `treeComparator` is `null`, this method keeps
> returning a constant lambda.
This one looks fine, accepted.
-------------
PR: https://git.openjdk.org/jdk/pull/9901
