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From: Robert Klemme <shortcutter@googlemail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Question about HashMap and Map.Entry ...
Date: Sat, 01 Sep 2012 11:06:17 +0200
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On 08/31/2012 08:22 PM, Daniel Pitts wrote:

> The real reason IMHO to use "long" over "Long", is that Long can be
> null, and sometimes that just doesn't make any sense semantically. The
> fact that it tends to be faster and use less memory is just a benefit.
>
> Same goes for all primitives vs primitive wrappers.

Definitively agree.  I mentioned it only as an additional benefit. 
Another reason to use object types is of course that the data structure 
is a generic one (such as keys or values in a Map) so there is no other 
option. :-)

Kind regards

	robert