This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
Sam Samson wrote:VisualVM is a profiler too, isn't it?
But I can't see an option which show me the actual created objects on the heap, and which are eligible for the garbage collector.
Application menu --> Heap Dump will show the instances. I'm not sure off the top of my head how to find which ones are GC-eligible or if that feature is even there. Feel free to read the docs, play around with it, google for tips, and try out the free versions of the others I mentioned.