Module java.base

Package java.util.function

Interface Consumer<T>

Type Parameters:

T - the type of the input to the operation

All Known Subinterfaces:

Stream.Builder<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Consumer<T>

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 Type	Method	Description
void	accept(T t)	Performs this operation on the given argument.
default Consumer<T>	andThen(Consumer<? super T> after)	Returns a composed Consumer that performs, in sequence, this operation followed by the after operation.

Method Details

accept

void accept(T t)

Performs this operation on the given argument.

Parameters:

t - the input argument

andThen

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 - the operation to perform after this operation

Returns:

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

Throws:

NullPointerException - if after is null