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From: Jukka Lahtinen <jtfjdehf@hotmail.com.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: "Program to an interface" - When to break a design pattern
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Date: Fri, 06 May 2011 15:01:09 +0300
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Lew <noone@lewscanon.com> writes:
> Jim Janney wrote:
>> The justification is not in the code shown, but in the accompanying
>> remark "I need the map to retain the insertion order."  There's no
>> interface in the JRE that promises this,

> other than
> <http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html>
> you mean.

But I'm looking at the SortedMap and LinkedHashMap javadocs, and it
seems to me that LinkedHashMap doesn't implement the SortedMap
interface. 
So, defining the return value as SortedMap you'd have to change the
actual implementation class.

-- 
Jukka Lahtinen