Object creation (state initialisation) and thread safety

Question

I am look into the book \"Java Concurrency in Practice\" and found really hard to believe below quoted statement (But unfortunately it make sense).

http://www.informit.c

Answer 1

You misread the book. It explicitely says:

The problem here is not the Holder class itself, but that the Holder is not properly published.

So the above construct if fine. What's not fine is to improperly publish such an object to other threads. The book explains that in details.