Actually, this question has no big meaning, I guess.
The situation is: I have a method with an "Object o" parameter.
In this method, I exactly know there is a string in "o" which is not null. There is no need to check, or do something else. I have to treat it exactly like a String
object.
Just curious - what is cheaper - cast it to String
, or use Object.toString()
?
Or is it same by time-/cpu-/mem- price?
Update: The method accepts "Object" because it's the implementation of an interface. There is no way to change the parameter type.
And it can't be null at all. I just wanted to say that I do not need to check it for null or emptyness. In my case, there is always a nonempty string.