Groups > comp.lang.java.programmer > #11371

Re: exporting a HashMap

Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post01.iad.highwinds-media.com!newsfe12.iad.POSTED!83aa503d!not-for-mail
From	Daniel Pitts <newsgroup.nospam@virtualinfinity.net>
User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0
MIME-Version	1.0
Newsgroups	comp.lang.java.programmer
Subject	Re: exporting a HashMap
References	<ljv5h7pl5t57ikpoqntvu1iif4tkrl9l7t@4ax.com>
In-Reply-To	<ljv5h7pl5t57ikpoqntvu1iif4tkrl9l7t@4ax.com>
Content-Type	text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding	7bit
Lines	13
Message-ID	<SbOQq.445$DC7.289@newsfe12.iad> (permalink)
X-Complaints-To	abuse@newsrazor.net
NNTP-Posting-Date	Mon, 16 Jan 2012 05:02:42 UTC
Date	Sun, 15 Jan 2012 21:02:40 -0800
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:11371

Show key headers only | View raw

On 1/15/12 8:30 AM, Roedy Green wrote:
> What is best code to export key-value pairs from a HashMap into some
> structure in key-value order.
>
> One possible way is to extract the keys, sort them, then look up the
> values.  That strikes me as infantile.  Surely there is a better way.
>
> The best I can think of is to invent a Pair dummy class, extract the
> fields from an Entry into the two fields, and sort them in an array.
>
> Part of the problem is generics and arrays don't mix.
Uh, TreeMap is in key order. Why would you use HashMap if you want key 
order?

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

exporting a HashMap Roedy Green <see_website@mindprod.com.invalid> - 2012-01-15 08:30 -0800
  Re: exporting a HashMap Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-01-15 12:01 -0500
    Re: exporting a HashMap Roedy Green <see_website@mindprod.com.invalid> - 2012-01-16 02:06 -0800
    Re: exporting a HashMap Roedy Green <see_website@mindprod.com.invalid> - 2012-01-17 09:04 -0800
      Re: exporting a HashMap Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-01-17 20:38 -0500
  Re: exporting a HashMap Arne Vajhøj <arne@vajhoej.dk> - 2012-01-15 12:25 -0500
    Re: exporting a HashMap Lew <noone@lewscanon.com> - 2012-01-15 10:22 -0800
      Re: exporting a HashMap Roedy Green <see_website@mindprod.com.invalid> - 2012-01-16 10:55 -0800
        Re: exporting a HashMap Arne Vajhøj <arne@vajhoej.dk> - 2012-01-16 14:55 -0500
          Re: exporting a HashMap Lew <noone@lewscanon.com> - 2012-01-16 14:19 -0800
            Re: exporting a HashMap David Lamb <dalamb@cs.queensu.ca> - 2012-01-16 18:31 -0500
            Re: exporting a HashMap Roedy Green <see_website@mindprod.com.invalid> - 2012-01-17 09:54 -0800
      Re: exporting a HashMap Arne Vajhøj <arne@vajhoej.dk> - 2012-01-16 15:07 -0500
  Re: exporting a HashMap Steven Simpson <ss@domain.invalid> - 2012-01-15 19:22 +0000
  Re: exporting a HashMap Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-01-15 21:02 -0800

csiph-web