archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-08-28 15:24:43 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8156071: List.of: reduce array copying during creation

Browse source 
Reviewed-by: psandoz, redestad
This commit is contained in:
Stuart Marks 2020-10-05 17:00:57 +00:00
parent ea27a54bf0
commit 88d75c9ad5
6 changed files with 203 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

5
src/java.base/share/classes/java/util/stream/Collectors.java
View file

@ -56,6 +56,8 @@ import java.util.function.ToDoubleFunction;
import java.util.function.ToIntFunction;
import java.util.function.ToLongFunction;
import jdk.internal.access.SharedSecrets;
/**
* Implementations of {@link Collector} that implement various useful reduction
* operations, such as accumulating elements into collections, summarizing
@ -296,7 +298,8 @@ public final class Collectors {
Collector<T, ?, List<T>> toUnmodifiableList() {
return new CollectorImpl<>((Supplier<List<T>>) ArrayList::new, List::add,
(left, right) -> { left.addAll(right); return left; },
list -> (List<T>)List.of(list.toArray()),
list -> (List<T>)SharedSecrets.getJavaUtilCollectionAccess()
.listFromTrustedArray(list.toArray()),
CH_NOID);
}