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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.util.function;
import java.util.Objects;
/**
* Represents an operation that accepts two input arguments and returns no
* result. This is the two-arity specialization of {@link Consumer}.
* Unlike most other functional interfaces, {@code BiConsumer} is expected
* to operate via side-effects.
*
* This is a functional interface
* whose functional method is {@link #accept(Object, Object)}.
*
* @param the type of the first argument to the operation
* @param the type of the second argument to the operation
*
* @see Consumer
* @since 1.8
*/
@FunctionalInterface
public interface BiConsumer {
/**
* Performs this operation on the given arguments.
*
* @param t the first input argument
* @param u the second input argument
*/
void accept(T t, U u);
/**
* Returns a composed {@code BiConsumer} that performs, in sequence, this
* operation followed by the {@code 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 {@code after} operation will not be performed.
*
* @param after the operation to perform after this operation
* @return a composed {@code BiConsumer} that performs in sequence this
* operation followed by the {@code after} operation
* @throws NullPointerException if {@code after} is null
*/
default BiConsumer andThen(BiConsumer after) {
Objects.requireNonNull(after);
return (l, r) -> {
accept(l, r);
after.accept(l, r);
};
}
}