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From: Jan Burse <janburse@fastmail.fm>
Newsgroups: comp.lang.java.programmer
Subject: Re: BitSet vs BigInteger (false Android doc)
Date: Tue, 06 Sep 2011 12:12:38 +0200
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Jan Burse schrieb:
> ut what concerns the Android comment. It is false because
> two's complement is not relevant when we compare BitSet and
> BigInteger, because two's complement is one way to represent
> a negative number:
>
>        ...1xxxxxxx

Lew wrote:
 > The concepts of sign-magnitude, 1s- or 2s-complement, sign, sign
 > extension, and negative and positive values are all
 > equally meaningless and completely irrelevant for BitSet.

At least here you agree that the Android java doc comment
is flawed. But then somehow your abandon your own observations
in favor of the "obvious":

Lew also wrote:
 > Are you referring to Android's documentation for BigInteger, which
 > states, "This API includes operations for bitwise operations in two's
 > complement [sic] representation. Two's complement is not the internal 
 > representation used by this implementation, so such methods may be
 > inefficient. Use _BitSet_ for high-performance bitwise operations on
 > arbitrarily-large sequences of bits."?
 >
 > How is that false?  It's obviously factual and correct.

Bye