First of all it doesn't matter that the class is final. Using one of its static members has nothing to do with whether the class can be extended (which is what final is about).
And don't create an instance of the class for the purpose of accessing the static member. It's true that Java allows you to do that, but it's unnecessary and confusing, so don't do it that way. Just use the ordinary way where you use the class to access the member:
As Paul said you can use the static members directly by using class name.
If you declare any member (Either variable or method) as static then you can access that member using class name. But in your code you are trying to access the member by creating an object instead use class name it will save memory.
subject: Effects from using static class members from a final class, in another class