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Groups > comp.lang.java.programmer > #12448

Re: Additional logging questions

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On 02/27/2012 11:14 AM, Novice wrote:
> I don't touch hashCode(), equals() or compareTo() very often at all. Or
> toString() either for that matter. But overriding hashCode() and equals()
> solved a big problem for me recently. I was writing a holder class that
> contained three fields, a table name, a row number and a column number,
> as a key for a hash map and then storing the column width in the value
> portion of the map. But when I tried to look up a given combination of
> table name, row number and column number I was never finding values that
> I knew were there. I googled and found out that I needed to revise
> hashCode() and equals() and rougly what those changes needed to be and
> then my lookups went fine. But I didn't touch compareTo(). Hmm, maybe I
> need to revisit that and make sure it doesn't need some tweaking too....

Read the Javadocs for those methods.

'compareTo()' is not universal, being present only in instances of 
'Comparable<T>'.

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg

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Additional logging questions Novice <novice@example..com> - 2012-02-27 02:02 +0000
  Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-26 21:08 -0500
    Re: Additional logging questions Novice <novice@example..com> - 2012-02-27 04:12 +0000
      Re: Additional logging questions Lew <noone@lewscanon.com> - 2012-02-26 22:13 -0800
        Re: Additional logging questions Novice <novice@example..com> - 2012-02-27 19:14 +0000
          Re: Additional logging questions Lew <noone@lewscanon.com> - 2012-02-27 12:32 -0800
          Re: Additional logging questions Lew <noone@lewscanon.com> - 2012-02-27 13:06 -0800
            Re: Additional logging questions Novice <novice@example..com> - 2012-02-28 01:48 +0000
              Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-27 20:57 -0500
                Re: Additional logging questions Lew <noone@lewscanon.com> - 2012-02-27 23:51 -0800
          Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-27 20:50 -0500
            Re: Additional logging questions Lew <noone@lewscanon.com> - 2012-02-27 23:57 -0800
        Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-27 20:45 -0500
          Re: Additional logging questions Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-02-28 01:52 -0600
            Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-28 17:20 -0500
            Re: Additional logging questions Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-02-28 20:26 -0400
      Re: Additional logging questions Arne Vajhøj <arne@vajhoej.dk> - 2012-02-27 20:34 -0500
  Re: Additional logging questions Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-02-27 12:36 -0800
    Re: Additional logging questions Novice <novice@example..com> - 2012-02-28 01:43 +0000

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