• 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

    • Method Summary

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

      Returns a unary operator that always returns its input argument.

    • Method Detail

      • identity

        static <T> UnaryOperator<T> identity()

        Returns a unary operator that always returns its input argument.

        Type Parameters:
        T - the type of the input and output of the operator
        Returns:
        a unary operator that always returns its input argument