Optimizing Java

[OcsiS]

To optimize my Java servlet, I want to know if java creat a new instance for all uper-class of the new instance I creat.
Is it fastest and lower in memory to creat an instance of a class inherited from Object than an instance of a sixth or seven level class.

Is there any way to have something like #define in java.

Thanks for help.

--SiscO-- French Developper