Interface UnaryOperator<T>

Type Parameters:
T - the type of the operand and result of the operator
All Superinterfaces:
Function<T,T>
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 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(Object).

Since:
1.8
See Also:
Function

Methods

Modifier and Type Method and Description
static <T> UnaryOperator<T> identity()

Returns a unary operator that always returns its input argument.

Methods inherited from interface java.util.function.Function

andThen, apply, compose

Methods

identity

static <T> UnaryOperator<T> identity()

Returns a unary operator that always returns its input argument.

Specified by:
identity in interface Function<T,T>
Type Parameters:
T - the type of the input and output of the operator
Returns:
a unary operator that always returns its input argument

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https://docs.oracle.com/javase/8/docs/api/java/util/function/UnaryOperator.html