Size of the object

Question

Hi friends I want to know that a class implements two interfaces each containing three methods. The class contains no instance data. Anyone like to tell me what will be the size of the object created from this class?

Vulpes · Answer

The size of the object on the heap will be 12 bytes (32 bit system) or 24 bytes (64 bit system). Every instance of an object requires 8 bytes (32 bit) or 16 bytes (64 bit) of overhead. Even if there are no instance fields it also needs an additional byte as a marker. In practice to maintain alignment 4 or 8 bytes will be allocated instead of one.

Pankaj Rana · Answer

hi Michell as object of class is reference type so you can not find the size of its object. You can find the size of value type(like int) only using sizeOf method

Sam Hobbs · Answer

Did you try it?