Groups > comp.lang.java.programmer > #7619

Re: BitSet vs BigInteger (false Android doc)

From	Jan Burse <janburse@fastmail.fm>
Newsgroups	comp.lang.java.programmer
Subject	Re: BitSet vs BigInteger (false Android doc)
Date	2011-09-06 12:44 +0200
Organization	albasani.net
Message-ID	<j44tja$7np$1@news.albasani.net> (permalink)
References	(7 earlier) <j3u3me$k4s$1@news.albasani.net> <4e655c24$0$308$14726298@news.sunsite.dk> <j44ga5$970$1@news.albasani.net> <826a6f26-c540-4ee9-a0c6-1cf77f20d765@glegroupsg2000goo.googlegroups.com> <j44qq9$10g$1@news.albasani.net>

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Jan Burse schrieb:
> And implicitly the Android comment is also false, since it
> implies that two's complement is the only way to represent
> negative numbers and it is also false, since it implies
> that some of negative number representations have a negative
> complexity impact on negative number bitwise operations.

Correction:
And implicitly the Android comment is also false, since it
implies that two's complement is the only way to efficiently
represent negative numbers for a bitwise operations with
two's complement semantic.


That non two's complement representations with two's
complement semantic can also be efficient I have indicated
in a response to Patricia Shanahan. There some implementation
with sign-and-magnitude can also work fast.



Bye

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Thread

BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-02 21:48 +0200
  Re: BitSet vs BigInteger (false Android doc) Arne Vajhøj <arne@vajhoej.dk> - 2011-09-02 16:23 -0400
    Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-02 13:34 -0700
      Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-02 22:51 +0200
        Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-02 18:58 -0700
          Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-03 20:15 +0200
            Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-03 12:37 -0700
              Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-03 22:46 +0200
                Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-03 16:32 -0700
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-04 02:58 +0200
                Re: BitSet vs BigInteger (false Android doc) Arne Vajhøj <arne@vajhoej.dk> - 2011-09-05 19:32 -0400
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 08:58 +0200
                Re: BitSet vs BigInteger (false Android doc) Lew <lewbloch@gmail.com> - 2011-09-06 00:41 -0700
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 11:57 +0200
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 12:12 +0200
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 12:44 +0200
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 12:02 +0200
                Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-06 13:38 -0700
                Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-06 10:33 -0700
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 22:28 +0200
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-06 22:41 +0200
                Re: BitSet vs BigInteger (false Android doc) Patricia Shanahan <pats@acm.org> - 2011-09-06 14:34 -0700
                Re: BitSet vs BigInteger (false Android doc) Lew <lewbloch@gmail.com> - 2011-09-06 14:51 -0700
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-07 00:33 +0200
                Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-07 00:40 +0200
            Re: BitSet vs BigInteger (false Android doc) Arne Vajhøj <arne@vajhoej.dk> - 2011-09-05 19:26 -0400
      Re: BitSet vs BigInteger (false Android doc) Robert Klemme <shortcutter@googlemail.com> - 2011-09-03 17:01 +0200
    Re: BitSet vs BigInteger (false Android doc) Jan Burse <janburse@fastmail.fm> - 2011-09-02 22:49 +0200
      Re: BitSet vs BigInteger (false Android doc) Gene Wirchenko <genew@ocis.net> - 2011-09-02 14:48 -0700
  Re: BitSet vs BigInteger (false Android doc) Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-03 13:54 -0400

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