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68 lines
1.7 KiB
68 lines
1.7 KiB
/*
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* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.util.function;
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import java.util.Objects;
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/**
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* Represents an operation that accepts a single {@code double}-valued argument and
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* returns no result. This is the primitive type specialization of
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* {@link Consumer} for {@code double}. Unlike most other functional interfaces,
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* {@code DoubleConsumer} is expected to operate via side-effects.
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*
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* <p>This is a <a href="package-summary.html">functional interface</a>
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* whose functional method is {@link #accept(double)}.
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*
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* @see Consumer
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* @since 1.8
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*/
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@FunctionalInterface
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public interface DoubleConsumer {
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/**
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* Performs this operation on the given argument.
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*
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* @param value the input argument
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*/
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void accept(double value);
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/**
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* Returns a composed {@code DoubleConsumer} that performs, in sequence, this
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* operation followed by the {@code after} operation. If performing either
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* operation throws an exception, it is relayed to the caller of the
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* composed operation. If performing this operation throws an exception,
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* the {@code after} operation will not be performed.
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*
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* @param after the operation to perform after this operation
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* @return a composed {@code DoubleConsumer} that performs in sequence this
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* operation followed by the {@code after} operation
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* @throws NullPointerException if {@code after} is null
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*/
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default DoubleConsumer andThen(DoubleConsumer after) {
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Objects.requireNonNull(after);
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return (double t) -> { accept(t); after.accept(t); };
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}
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}
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