Groups > comp.lang.java.programmer > #17854

Re: hashCode

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!news-out.readnews.com!transit3.readnews.com!news-out.news.tds.net!newsreading01.news.tds.net!53ab2750!not-for-mail
From	"Arne Vajhøj" <�� høj@1:261/38.remove-odu-this>
Subject	Re: hashCode
Message-ID	<50294F03.56802.calajapr@time.synchro.net> (permalink)
X-Comment-To	Lew
Newsgroups	comp.lang.java.programmer
In-Reply-To	<502943B2.56752.calajapr@time.synchro.net>
References	<502943B2.56752.calajapr@time.synchro.net>
X-FTN-AREA	COMP.LANG.JAVA.PROGRAMMER
X-FTN-MSGID	1:261/38 bbc6b6f2
X-FTN-REPLY	1:261/38 95075123
Content-Type	text/plain; charset=IBM437
Content-Transfer-Encoding	8bit
X-Gateway	time.synchro.net [Synchronet 3.16a-Win32 NewsLink 1.98]
Lines	34
Date	Mon, 13 Aug 2012 19:38:33 GMT
NNTP-Posting-Host	69.21.70.65
X-Complaints-To	news@tds.net
X-Trace	newsreading01.news.tds.net 1344886713 69.21.70.65 (Mon, 13 Aug 2012 14:38:33 CDT)
NNTP-Posting-Date	Mon, 13 Aug 2012 14:38:33 CDT
Organization	tds.net
Xref	csiph.com comp.lang.java.programmer:17854

Show key headers only | View raw

  To: Lew
From: "=?UTF-8?B?QXJuZSBWYWpow7hq?=" <=?utf-8?b?qxjuzsbwywpow7hq?=@1:261/38.rem
ove-nlb-this>

  To: Lew
From: =?UTF-8?B?QXJuZSBWYWpow7hq?= <arne@vajhoej.dk>

On 8/12/2012 12:46 AM, Lew wrote:
> Arne Vajh-,j wrote:
>> But with the same performance note. And a big sigh because it
>> seems to want to broaden bad performance from a single class
>> to the entire programming style (multiple classes).
>
> Overriding 'hashCode()' is done for functional reasons, not performance
> reasons. If you fail to override the method, you'll get incorrect
> behavior, for example failing to find a collection member that is
> actually present.

Correct.

But the return constant is a special case. It functions as it should but 
performs very poorly.

Arne

-+- BBBS/Li6 v4.10 Dada-1
 + Origin: Prism bbs (1:261/38)
-+- Synchronet 3.16a-Win32 NewsLink 1.98
Time Warp of the Future BBS - telnet://time.synchro.net:24

--- BBBS/Li6 v4.10 Dada-1
 * Origin: Prism bbs (1:261/38)
--- Synchronet 3.16a-Win32 NewsLink 1.98
Time Warp of the Future BBS - telnet://time.synchro.net:24

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

Thread

Re: hashCode "Lew" <lew@1:261/38.remove-nlb-this> - 2012-08-13 18:36 +0000
  Re: hashCode "Arne Vajhøj" <������
høj@1:261/38.remove-odu-this> - 2012-08-13 19:38 +0000
  Re: hashCode "Arne Vajhøj" <������
høj@1:261/38.remove-odu-this> - 2012-08-13 19:38 +0000

csiph-web