程序包 java.util.function

接口 UnaryOperator<T>

类型参数:

T - the type of the operand and result of the operator

所有超级接口:

Function<T,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 UnaryOperator<T>
extends Function<T,T>

Represents an operation on a single operand that produces a result of the same type as its operand. This is a specialization of Function for the case where the operand and result are of the same type.

This is a functional interface whose functional method is Function.apply(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
static <T> UnaryOperator<T>	identity()	Returns a unary operator that always returns its input argument.

从接口继承的方法 java.util.function.Function

andThen, apply, compose

方法详细资料

identity

static <T> UnaryOperator<T> identity()

Returns a unary operator that always returns its input argument.

类型参数:

T - the type of the input and output of the operator

返回:

a unary operator that always returns its input argument