DoubleFunction (Java SE 17 & JDK 17)
Description: declaration: module: java.base, package: java.util.function, interface: DoubleFunction
Keywords: java.util.function.DoubleFunction interface

Module java.base
Package java.util.function

# Interface DoubleFunction<R>

Type Parameters:
  `R` - the type of the result of the function

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 DoubleFunction<R>
Represents a function that accepts a double-valued argument and produces a result. This is the `double`-consuming primitive specialization for `Function`.

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

Since:
  1.8
See Also:
  - `Function`

- ## Method Summary

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

- ## Method Details

  - ### apply

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