Interface Collector<T,A,R>

public interface Collector<T,A,R>

How Stream.collect(Collector) folds the elements of a stream into a result: a container to start from, a step per element, a way to merge two containers and a last step that turns the container into the result.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	Collector.Characteristics	What a collector says about itself.

Method Summary

Modifier and Type	Method	Description
BiConsumer<A,T>	accumulator()
Set<Collector.Characteristics>	characteristics()
BinaryOperator<A>	combiner()
Function<A,R>	finisher()
static <T,A,R> Collector<T,A,R>	of(Supplier<A> supplier, BiConsumer<A,T> accumulator, BinaryOperator<A> combiner, Function<A,R> finisher, Collector.Characteristics... characteristics)
static <T,R> Collector<T,R,R>	of(Supplier<R> supplier, BiConsumer<R,T> accumulator, BinaryOperator<R> combiner, Collector.Characteristics... characteristics)
Supplier<A>	supplier()

Method Details

supplier

Supplier<A> supplier()

accumulator

BiConsumer<A,T> accumulator()

combiner

BinaryOperator<A> combiner()

finisher

Function<A,R> finisher()

characteristics

Set<Collector.Characteristics> characteristics()

of

static <T,R> Collector<T,R,R> of(Supplier<R> supplier,
 BiConsumer<R,T> accumulator,
 BinaryOperator<R> combiner,
 Collector.Characteristics... characteristics)

of

static <T,A,R> Collector<T,A,R> of(Supplier<A> supplier,
 BiConsumer<A,T> accumulator,
 BinaryOperator<A> combiner,
 Function<A,R> finisher,
 Collector.Characteristics... characteristics)