Measure heap used by each object in Java

Question

Can some suggest a good a free memory profiling tool which will show memory being used by each object in the heap separately. We are trying to profile our application and I used jconsole but its gives me total memory usage only. I am using Eclipse and OC4J

Answer 1

Visual VM

https://visualvm.dev.java.net/

Answer 2

Eclipse Memory Analyzer

Answer 3

Not free, but IMHO the best one: http://www.yourkit.com/