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