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Top Description Methods
java.util.function

public Interface Consumer<T>

Known Direct Subinterfaces
java.lang.classfile.ClassFileBuilder, java.util.stream.Sink, java.util.stream.Stream.Builder
Known Direct Implementers
java.util.stream.GathererOp.NodeBuilder, java.util.stream.SpinedBuffer, java.util.stream.StreamSpliterators.UnorderedSliceSpliterator.OfRef, java.util.stream.StreamSpliterators.DistinctSpliterator, java.util.stream.StreamSpliterators.ArrayBuffer.OfRef, java.util.stream.WhileOps.UnorderedWhileSpliterator.OfRef, jdk.internal.foreign.BufferStack.PerThread.CleanupAction, jdk.internal.classfile.impl.ChainedClassBuilder, java.util.Spliterators.AbstractSpliterator.HoldingConsumer
Annotations
@FunctionalInterface
Type Parameters
<T>
the type of the input to the operation
Imports
java.util.Objects
Represents an operation that accepts a single input argument and returns no result. Unlike most other functional interfaces, Consumer is expected to operate via side-effects.

This is a functional interface whose functional method is accept(Object).

Since
1.8

Method Summary

Modifier and TypeMethod and Description
public void
accept(T
the input argument
t)

Performs this operation on the given argument.

public default Consumer<T>

Returns:

a composed Consumer that performs in sequence this operation followed by the after operation
andThen(Consumer<? super T>
the operation to perform after this operation
after)

Returns a composed Consumer that performs, in sequence, this operation followed by the after operation.

Method Detail

acceptback to summary
public void accept(T t)

Performs this operation on the given argument.

Parameters
t:T

the input argument

andThenback to summary
public default Consumer<T> andThen(Consumer<? super T> after)

Returns a composed Consumer that performs, in sequence, this operation followed by the after operation. If performing either operation throws an exception, it is relayed to the caller of the composed operation. If performing this operation throws an exception, the after operation will not be performed.

Parameters
after:Consumer<? super T>

the operation to perform after this operation

Returns:Consumer<T>

a composed Consumer that performs in sequence this operation followed by the after operation

Exceptions
NullPointerException:
if after is null