# Interface DoubleToLongFunction

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 DoubleToLongFunction
Represents a function that accepts a double-valued argument and produces a long-valued result. This is the `double`-to-`long` primitive specialization for `Function`.

This is a functional interface whose functional method is `applyAsLong(double)`.

Since:
  1.8
See Also:
  - `Function`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `long`
  `applyAsLong(double value)`
  Applies this function to the given argument.

- ## Method Details

  - ### applyAsLong

    long applyAsLong(double value)
    Applies this function to the given argument.
    Parameters:
      `value` - the function argument
    Returns:
      the function result