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package java.util.function;

import java.util.Objects;


Represents an operation that accepts a single double-valued argument and returns no result. This is the primitive type specialization of Consumer for double. Unlike most other functional interfaces, DoubleConsumer is expected to operate via side-effects. 
This is a functional interface whose functional method is accept(double). 
See Also:
Since:1.8
/**
 * 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.

Params:
  • value – the input argument
/**
     * Performs this operation on the given argument.
     *
     * @param value the input argument
     */
    void accept(double value);

    
Returns a composed DoubleConsumer 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. 
Params:
  • after – the operation to perform after this operation
Throws:
Returns:a composed DoubleConsumer that performs in sequence this operation followed by the after operation
/**
     * 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); };
    }
}