On Wed, 17 Aug 2022 11:23:57 GMT, Сергей Цыпанов <[email protected]> wrote:
> We can use `Comparator.naturalOrder()` for cases when a `TreeMap` instance is
> constructed without comparator. This allows to squash two branches in
> `TreeMap.get()` into one.
>
> P.S. I think the comment of `TreeMap.getEntryUsingComparator()` is outdated.
> Should we also change it?
src/java.base/share/classes/java/util/TreeMap.java line 3318:
> 3316: // Adapt or create a key-based comparator
> 3317: Comparator<? super K> treeComparator = tree.comparator;
> 3318: return Map.Entry.comparingByKey(treeComparator == null ?
> natural() : treeComparator);
You can probably have:
return treeComparator == nul ?
Map.Entry.comparingByKey() :
Map.Entry.comparingByKey(treeComparator);
instead.
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PR: https://git.openjdk.org/jdk/pull/9901
