Java Programming

i am trying to subclass the LogManager class and have tried adding the following System property as mentioned in the Java API :-

java.util.logging.manager = CustomLogger

where,
CustomLogger is the name of my subclass of LogManager.

Still, when I ran the program, the instance of the global log manager (java.util.logging.LogManager) is only created. It's not creating the instance of "CustomLogger".
I have tried to give the full package name of the subclass as follows, still it is creating the instance of java.util.logging.LogManager only:-

java.util.logging.manager = com.test.logging.CustomLogger

Any pointers to resolve this issue will be of great help..

~Thanks
Dev