Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #25370

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 13:30 +0000
Organization A noiseless patient Spider
Message-ID <slrnl4b22r.mol.avl@gamma.logic.tuwien.ac.at> (permalink)
References <slrnl45s71.mol.avl@gamma.logic.tuwien.ac.at> <l1vfg6$mi$1@dont-email.me> <l202uq$ae1$1@dont-email.me> <slrnl48s79.mol.avl@gamma.logic.tuwien.ac.at> <l227v3$f6i$1@dont-email.me>

Show all headers | View raw

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.

The apparent point for CharSequence was, that it looked like a
vehicle to pass a number and a char into StringBuilder.append().

> If that hits performance, then you have got a conflict between your goal
> of being OO and that of performance, and you'll have to scrap one.

If the OO path for a task turns out goofy, then I pick the other one.

PS: there's probably also a third path: copying StringBuilder.java from
  src.zip and adding an .append(int n, char ch) overload. ;)

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

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