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