| Package | Description | 
|---|---|
| java.util.stream | Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Collector.Characteristics | Collector.Characteristics. valueOf(String name)Returns the enum constant of this type with the specified name. | 
| static Collector.Characteristics[] | Collector.Characteristics. values()Returns an array containing the constants of this enum type, in
the order they are declared. | 
| Modifier and Type | Method and Description | 
|---|---|
| Set<Collector.Characteristics> | Collector. characteristics()Returns a  SetofCollector.Characteristicsindicating
 the characteristics of this Collector. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <T,A,R> Collector<T,A,R> | Collector. of(Supplier<A> supplier,
  BiConsumer<A,T> accumulator,
  BinaryOperator<A> combiner,
  Function<A,R> finisher,
  Collector.Characteristics... characteristics)Returns a new  Collectordescribed by the givensupplier,accumulator,combiner, andfinisherfunctions. | 
| static <T,R> Collector<T,R,R> | Collector. of(Supplier<R> supplier,
  BiConsumer<R,T> accumulator,
  BinaryOperator<R> combiner,
  Collector.Characteristics... characteristics)Returns a new  Collectordescribed by the givensupplier,accumulator, andcombinerfunctions. | 
 Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2025, Oracle and/or its affiliates.  All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.