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From: Stanimir Stamenkov <s7an10@netscape.net>
Newsgroups: comp.lang.java.programmer
Subject: Re: Create Dynamic Proxy for class instead of interface
Date: Sun, 12 Jun 2011 20:42:37 +0300
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Sun, 12 Jun 2011 19:07:41 +0200, /Robert Klemme/:

> If you read closely what the Javadoc of ProxyFactory say, you will
> notice that you get a _new_ class which is a _subclass_ of the class
> that you want to augment. For that you do not need proxy mechanisms.
> In fact it is much simpler to inherit the class and make the new
> class implement additional interfaces.
> [...]
> Why do you need to manipulate an existing class?

Though I don't know how useful it might be, I've played a bit at 
implementing the try-with-resources [1] (the easier part) and 
exception masking Java 7 features using Java 6 facilities.  For the 
later I needed to create proxy exceptions augmented with interface 
allowing to attach 'suppressed' exceptions information.

[1] 
http://www.oracle.com/technetwork/articles/java/trywithresources-401775.html

-- 
Stanimir