Module java.base
Package java.util.function

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.
    @FunctionalInterfacepublic interfaceUnaryOperator<T>extendsFunction<T,​T>
    Represents an operation on a single operand that produces a result of the same type as its operand. This is a specialization ofFunction for the case where the operand and result are of the same type.

    This is afunctional interface whose functional method isFunction.apply(Object).

    Since:
    1.8
    See Also:
    Function

    • Method Summary

      Static Methods 
      Modifier and TypeMethodDescription
      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