程序包 java.util.function

接口 BiFunction<T,U,R>

类型参数:

T - the type of the first argument to the function

U - the type of the second argument to the function

R - the type of the result of the function

所有已知子接口:

BinaryOperator<T>

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 BiFunction<T,U,R>

Represents a function that accepts two arguments and produces a result. This is the two-arity specialization of Function.

This is a functional interface whose functional method is apply(java.lang.Object,java.lang.Object).

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
default <V> BiFunction<T,U,V>	andThen(Function<? super R,? extends V> after)	Returns a composed function that first applies this function to its input, and then applies the after function to the result.
R	apply(T t, U u)	Applies this function to the given arguments.

方法详细资料

apply

R apply(T t,
        U u)

Applies this function to the given arguments.

参数:

t - the first function argument

u - the second function argument

返回:

the function result

andThen

default <V> BiFunction<T,U,V> andThen(Function<? super R,? extends V> after)

Returns a composed function that first applies this function to its input, and then applies the after function to the result. If evaluation of either function throws an exception, it is relayed to the caller of the composed function.

类型参数:

V - the type of output of the after function, and of the composed function

参数:

after - the function to apply after this function is applied

返回:

a composed function that first applies this function and then applies the after function

抛出:

NullPointerException - if after is null