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From: markspace <-@.>
Newsgroups: comp.lang.java.programmer
Subject: Re: reading the JLS (17.4.5)
Date: Wed, 21 Dec 2011 12:09:41 -0800
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On 12/21/2011 12:37 AM, Andreas Leitgeb wrote:

> *iff* a *volatile* read gets to see the result of a *volatile*
> write, then doesn't that say anything about that the write must
> have "happened-before" the read?


Maybe you know this, but just in case:  yes, if a volatile like v1 is 
written and then read, ALL WRITES before the write of v1 are made 
visible, including the write of n1 which is not declared volatile.

Brian Goetz calls this "piggy-backing," where non-synchronized writes 
are made visible by piggy-backing on synchronized writes.