Gatherers

public final class Gatherers
extends Object

java.lang.Object
↳	java.util.stream.Gatherers

Implementations of Gatherer that provide useful intermediate operations, such as windowing functions, folding functions, transforming elements concurrently, etc.

Summary

Public methods
`static <T, R> Gatherer<T, ?, R>`	`fold(Supplier<R> initial, BiFunction<? super R, ? super T, ? extends R> folder)` Returns a Gatherer that performs an ordered, reduction-like, transformation for scenarios where no combiner-function can be implemented, or for reductions which are intrinsically order-dependent.
`static <T, R> Gatherer<T, ?, R>`	`scan(Supplier<R> initial, BiFunction<? super R, ? super T, ? extends R> scanner)` Returns a Gatherer that performs a Prefix Scan -- an incremental accumulation -- using the provided functions.
`static <TR> Gatherer<TR, ?, List<TR>>`	`windowFixed(int windowSize)` Returns a Gatherer that gathers elements into windows -- encounter-ordered groups of elements -- of a fixed size.
`static <TR> Gatherer<TR, ?, List<TR>>`	`windowSliding(int windowSize)` Returns a Gatherer that gathers elements into windows -- encounter-ordered groups of elements -- of a given size, where each subsequent window includes all elements of the previous window except for the least recent, and adds the next element in the stream.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code

Gatherers

Summary

Public methods

Inherited methods