UnaryOperator

AI-generated Key Takeaways

• UnaryOperator represents an operation on a single operand, producing a result of the same type.

• It is a specialization of the Function interface for cases where the operand and result types are identical.

• The primary method is apply, inherited from Function, which applies the operation to the given argument.

• UnaryOperator provides a static identity method, returning an operator that simply returns its input unchanged.

public interface UnaryOperator implements 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).

See Also

• Function

Public Method Summary

static <T> UnaryOperator<T>

identity() Returns a unary operator that always returns its input argument.

Inherited Method Summary

From interface java.util.function.Function

<V> Function<T, 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.
abstract T	apply(T t) Applies this function to the given argument.
<V> Function<V, T>	compose(Function<? super V, ? extends T> before) Returns a composed function that first applies the before function to its input, and then applies this function to the result.
static <T> Function<T, T>	identity() Returns a function that always returns its input argument.

Public Methods

public static UnaryOperator<T> identity ()

Returns a unary operator that always returns its input argument.

Returns

• a unary operator that always returns its input argument