Groups > comp.lang.java.programmer > #25377

Re: StringBuilder.append and CharSequence

From	Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at>
Newsgroups	comp.lang.java.programmer
Subject	Re: StringBuilder.append and CharSequence
Date	2013-09-27 23:16 +0000
Organization	A noiseless patient Spider
Message-ID	<slrnl4c4di.mol.avl@gamma.logic.tuwien.ac.at> (permalink)
References	(3 earlier) <slrnl48s79.mol.avl@gamma.logic.tuwien.ac.at> <l227v3$f6i$1@dont-email.me> <slrnl4b22r.mol.avl@gamma.logic.tuwien.ac.at> <l24fdo$ius$1@dont-email.me> <l24qp9$mco$1@dont-email.me>

Show all headers | View raw

markspace <markspace@nospam.nospam> wrote:
> On 9/27/2013 10:31 AM, Daniele Futtorovic wrote:
>> On 2013-09-27 15:30, Andreas Leitgeb allegedly wrote:
>>> Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> wrote:
>>>> I'd make the toString() as follows to be on the safe side:
>>>>    char[] cs = new char[ m_len ];
>>>>    Arrays.fill( cs, m_ch );
>>>>    return new String(cs);
>>> If this is the ONLY safe side, then there wouldn't be a point
>>> in implementing a CharSequence in the first place for my task.
>> Why not? The Standard API's StringBuilder#append(CharSequence), AFAICS,
>> does not call toString() -- granted, the JavaDoc stipulates nothing to
>> that effect.
>
> I read Andreas's comment as "there's not point introducing a new type if 
> a repeated string is just always turned into a regular String anyway."

Yes, that's about it.

The "new type" is the ChSeq from a few posts upthread.
The "repeated string" is a possibly long repetition of
just a single char, compactly represented by ChSeq...

Thread

StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-25 14:19 +0000
  Re: StringBuilder.append and CharSequence markspace <markspace@nospam.nospam> - 2013-09-25 13:02 -0700
    Re: StringBuilder.append and CharSequence markspace <markspace@nospam.nospam> - 2013-09-25 18:34 -0700
      Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-26 17:37 +0000
        Re: StringBuilder.append and CharSequence Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2013-09-26 23:11 +0200
          Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-27 13:30 +0000
            Re: StringBuilder.append and CharSequence Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2013-09-27 19:31 +0200
              Re: StringBuilder.append and CharSequence markspace <markspace@nospam.nospam> - 2013-09-27 13:45 -0700
                Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-27 23:16 +0000
                Re: StringBuilder.append and CharSequence Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2013-09-29 04:58 +0200
                Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-30 20:02 +0000
  Re: StringBuilder.append and CharSequence Arne Vajhøj <arne@vajhoej.dk> - 2013-09-25 20:57 -0400
    Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-26 18:01 +0000
      Re: StringBuilder.append and CharSequence Arne Vajhøj <arne@vajhoej.dk> - 2013-09-26 15:47 -0400
        Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-26 20:48 +0000
          Re: StringBuilder.append and CharSequence Arne Vajhøj <arne@vajhoej.dk> - 2013-09-26 16:58 -0400
            Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-09-27 12:52 +0000
              Re: StringBuilder.append and CharSequence Arne Vajhøj <arne@vajhoej.dk> - 2013-10-04 20:59 -0400
                Re: StringBuilder.append and CharSequence Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2013-10-05 12:51 +0000
  Re: StringBuilder.append and CharSequence Sven Köhler <remove-sven.koehler@gmail.com> - 2013-09-27 15:41 +0300

csiph-web