Groups > comp.lang.java.programmer > #37452

underscore as keyword in Java 9

Path	csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From	Andreas Leitgeb <avl@logic.at>
Newsgroups	comp.lang.java.programmer
Subject	underscore as keyword in Java 9
Date	Sat, 23 Sep 2017 11:58:35 -0000 (UTC)
Organization	A noiseless patient Spider
Lines	22
Message-ID	<slrnoscj1i.ijn.avl@logic.at> (permalink)
Reply-To	avl@logic.at
Injection-Date	Sat, 23 Sep 2017 11:58:35 -0000 (UTC)
Injection-Info	reader02.eternal-september.org; posting-host="234a3602e85db1ee1ead9fc6249d05ed"; logging-data="20703"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19QZQG1UxOtqMpY+OpHyx0c"
User-Agent	slrn/1.0.2 (Linux)
Cancel-Lock	sha1:HmhQ04izDG3v2uLg2f0Im95//Y8=
Xref	csiph.com comp.lang.java.programmer:37452

Show key headers only | View raw

When googling for underscore keyword I found a mail by Brian Goetz, where
he hinted for a future use of the "_" keyword:

  http://mail.openjdk.java.net/pipermail/lambda-dev/2013-July/010670.html

" However, things it might be used for include things like "I don't want
" to give this variable a name" (such as catch parameters that are never
" used.)

Now, some people might already have used that identifier in exactly such
circumstances, namely for variable names that need to be there
syntactically, but are not intended to be used.

It strikes me odd, that Java would first forbid them generally, only to 
later essentially encourage that particular use again.

Maybe, if that was the intention already 4 years ago, they should only 
have made uses of "_" as values (lvalue or rvalue) illegal.

Comments?  Maybe there have risen newer intentions for different uses
in the meantime?

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

Thread

underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-23 11:58 +0000
  Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-23 18:46 +0200
    Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-23 21:01 -0400
      Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-24 11:25 +0000
        Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-24 17:30 +0200
        Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-24 18:24 -0400
          Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-24 23:27 +0000
            Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-24 21:10 -0400
              Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-25 13:30 +0000
    Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-25 08:07 -0700
      Re: underscore as keyword in Java 9 lewbloch@gmail.com - 2017-09-25 13:21 -0700
      Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-25 23:30 +0200
        Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-25 20:24 -0400
          Re: underscore as keyword in Java 9 j4n bur53 <janburse@fastmail.fm> - 2017-09-26 13:37 +0200
          Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 19:05 +0200
            Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-27 10:25 -0700
              Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 23:02 +0200
            Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-27 20:02 -0400
              Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-28 05:11 -0700
                Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-28 20:42 -0400
          Re: underscore as keyword in Java 9 Sebastian <nowhere@nirvana.org> - 2017-09-27 20:26 +0200
            Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 23:10 +0200
        Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-26 08:29 +0000
          Re: underscore as keyword in Java 9 Silvio <silvio@internet.com> - 2017-09-27 19:08 +0200
          Re: underscore as keyword in Java 9 Sebastian <nowhere@nirvana.org> - 2017-09-27 21:46 +0200
  Re: underscore as keyword in Java 9 Eric Douglas <e.d.programmer@gmail.com> - 2017-09-27 06:53 -0700
    Re: underscore as keyword in Java 9 Andreas Leitgeb <avl@logic.at> - 2017-09-27 15:59 +0000
      Re: underscore as keyword in Java 9 Arne Vajhøj <arne@vajhoej.dk> - 2017-09-27 19:18 -0400
        Re: underscore as keyword in Java 9 Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-28 11:41 +0200

csiph-web