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: "=?UTF-8?B?QXJuZSBWYWpow7hq?=" <=?utf-8?b?qxjuzsbwywpow7hq?=@1:261/38.remove-odu-this>
Subject: Re: hashCode
Message-ID: <50294F03.56803.calajapr@time.synchro.net>
X-Comment-To: Patricia Shanahan
Newsgroups: comp.lang.java.programmer
X-FTN-AREA: COMP.LANG.JAVA.PROGRAMMER
X-FTN-MSGID: 1:261/38 2b737593
Content-Type: text/plain; charset=IBM437
Content-Transfer-Encoding: 8bit
X-Gateway: time.synchro.net [Synchronet 3.16a-Win32 NewsLink 1.98]
Lines: 35
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:17855

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

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

On 8/12/2012 12:40 PM, Patricia Shanahan wrote:
> Keeping hashCode as an Object method but making it useless for bucket
> selection unless overridden would not be a good alternative.
>
> A more reasonable alternative would be to have hashCode as the only
> member of a HashKey interface that would be implemented by every class
> whose objects are intended to be suitable for use as has keys. Those
> objects that have a hashCode would still have to have a usable one, but
> some classes would not implement HashKey and not have a hashCode at all.

That would avoid using the hash for classes where it does not make much sense.

I like it.

Given that there is a gazillion lines of code out there that stores Object, 
then it can not be changed.

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