程序包 java.util.function

接口 DoubleFunction<R>

类型参数:

R - the type of the result of the function

函数接口:

这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

@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).

从以下版本开始:

1.8

另请参阅:

Function

方法概要

限定符和类型	方法	说明
R	apply(double value)	Applies this function to the given argument.

方法详细资料

apply

R apply(double value)

Applies this function to the given argument.

参数:

value - the function argument

返回:

the function result