Is there any sizeof-like method in Java?

Question

Is there any built-in method in Java to find the size of any datatype? Is there any way to find size?

Answer 1

EhCache provides a SizeOf class that will try to use the Instrumentation agent and will fall back to a different approach if the agent is not loaded or cannot be loaded (details here).

Also see the agent from Heinz Kabutz.