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DoubleConsumer.java
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67 lines (63 loc) · 1.73 KB
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/*
* Copyright (c) 2010, 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 a single {@code double}-valued argument and
* returns no result. This is the primitive type specialization of
* {@link Consumer} for {@code double}. Unlike most other functional interfaces,
* {@code DoubleConsumer} is expected to operate via side-effects.
*
* <p>This is a <a href="package-summary.html">functional interface</a>
* whose functional method is {@link #accept(double)}.
*
* @see Consumer
* @since 1.8
*/
@FunctionalInterface
public interface DoubleConsumer {
/**
* Performs this operation on the given argument.
*
* @param value the input argument
*/
void accept(double value);
/**
* Returns a composed {@code DoubleConsumer} 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 DoubleConsumer} that performs in sequence this
* operation followed by the {@code after} operation
* @throws NullPointerException if {@code after} is null
*/
default DoubleConsumer andThen(DoubleConsumer after) {
Objects.requireNonNull(after);
return (double t) -> { accept(t); after.accept(t); };
}
}