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Remove further wildcards from Collectors

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This commit is contained in:
Andreas Stadelmeier 2024-12-17 20:39:01 +01:00
parent 7c06bd67df
commit bc4d7d1bc9
1 changed files with 2 additions and 21 deletions
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23
src/java.base/share/classes/java/util/stream/Collectors.java
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@ -245,24 +245,6 @@ public final class Collectors {
CH_ID);
}
/**
* Returns a {@code Collector} that accumulates the input elements into a
* new {@code List}. There are no guarantees on the type, mutability,
* serializability, or thread-safety of the {@code List} returned; if more
* control over the returned {@code List} is required, use {@link #toCollection(Supplier)}.
*
* @param <T> the type of the input elements
* @return a {@code Collector} which collects all the input elements into a
* {@code List}, in encounter order
*/
public static <T>
Collector<T, ArrayList<Object>, List<T>> toList2() {
return new CollectorImpl<>(ArrayList::new, List::add,
(left, right) -> { left.addAll(right); return left; },
CH_ID);
}
/**
* Returns a {@code Collector} that accumulates the input elements into an
* <a href="../List.html#unmodifiable">unmodifiable List</a> in encounter
@ -922,9 +904,8 @@ public final class Collectors {
}
}
}
return new CollectorImpl<>(
OptionalBox::new, OptionalBox::accept,
OptionalBox::new, Consumer<T>::accept,
(a, b) -> {
if (b.present) a.accept(b.value);
return a;
@ -970,7 +951,7 @@ public final class Collectors {
* @see #reducing(BinaryOperator)
*/
public static <T, U>
Collector<T, ?, U> reducing(U identity,
Collector<T, U[], U> reducing(U identity,
Function<? super T, ? extends U> mapper,
BinaryOperator<U> op) {
return new CollectorImpl<>(