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Groups > comp.lang.java.programmer > #18707

Re: can't throw

From Daniel Pitts <newsgroup.nospam@virtualinfinity.net>
Newsgroups comp.lang.java.programmer
Subject Re: can't throw
References <19af6b94-7a1e-4491-afb2-79782406f560@googlegroups.com> <abaoivFqnh9U1@mid.individual.net> <e726309e-8aa2-45e7-8452-80f1c2ef1b3f@googlegroups.com> <2da52903-55b6-4288-8f95-9799a5ce874c@googlegroups.com> <abccsfF8mgbU1@mid.individual.net>
Message-ID <SL74s.45$4D5.7@newsfe21.iad> (permalink)
Date 2012-09-12 15:10 -0700

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On 9/12/12 2:24 PM, Robert Klemme wrote:
> there is no point in throwing from Thread.run()
> or Runnable.run() other than catastrophic failures (all Errors such as
> OOM, all RuntimeExceptions which are really programmer mistakes) because
> you cannot customize handling of exceptions thrown from the run()
> method: this method is only invoked from class Thread and probably
> others in the Java standard library itself.
Actually, you can handle exceptions from a Thread. There is the 
UncaughtExceptionHandler:
<http://docs.oracle.com/javase/7/docs/api/java/lang/Thread.UncaughtExceptionHandler.html>

Though the only valuable use I have ever seen from this is in logging 
those failures differently than the default output.

> Instead, you should be
> handling exceptions in run() and terminate the thread gracefully (i.e.
> by returning from run()).

Agreed. If you need some other code to propagate an Exception, you need 
to pass that information along.  Exceptions are meant to unwind the 
stack. For most practical purposes a Thread's run() method really has no 
stack to unwind.  Even if you could throw an Exception from it, where 
would that Exception go? Who's going to deal with it?

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Thread

can't throw bob smith <bob@coolfone.comze.com> - 2012-09-11 13:16 -0700
  Re: can't throw markspace <-@.> - 2012-09-11 13:34 -0700
    Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-11 14:15 -0700
  Re: can't throw Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-11 17:02 -0400
    Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-11 14:17 -0700
      Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-11 21:21 -0400
        Re: can't throw Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2012-09-11 21:59 -0700
          Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-12 09:18 -0700
            Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-12 19:09 +0200
            Re: can't throw markspace <-@.> - 2012-09-12 10:56 -0700
            Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 18:36 -0400
              Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-12 18:29 -0700
                Re: can't throw Patricia Shanahan <pats@acm.org> - 2012-09-12 18:34 -0700
                Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 21:37 -0400
                Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 21:54 -0400
          Re: can't throw Jim Janney <jjanney@shell.xmission.com> - 2012-09-12 11:27 -0600
          Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 18:24 -0400
            Re: can't throw Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2012-09-13 22:20 -0700
              Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-14 09:49 -0700
                Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-14 20:50 +0200
                Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-14 13:02 -0700
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-14 14:06 -0700
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-14 13:16 -0700
                Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-14 23:07 +0200
                Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-14 14:28 -0700
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-16 20:04 -0700
        Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 18:16 -0400
          Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-12 23:15 -0700
        Re: can't throw Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-09-14 17:33 -0500
          Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-16 15:46 +0200
            Re: can't throw Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-09-16 12:17 -0500
              Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-16 22:36 +0200
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-16 20:07 -0700
                Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-17 07:41 +0200
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-17 09:51 -0700
                Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-17 21:00 +0200
                Re: can't throw Gene Wirchenko <genew@ocis.net> - 2012-09-17 13:23 -0700
                Re: can't throw Joerg Meier <joergmmeier@arcor.de> - 2012-09-17 18:52 +0200
                Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-17 11:22 -0700
                Re: can't throw Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-09-17 02:52 -0500
                Re: can't throw Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-09-17 02:39 -0500
                Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-17 21:02 +0200
  Re: can't throw markspace <-@.> - 2012-09-11 14:28 -0700
  Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-11 21:14 -0400
    Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 18:11 -0400
  Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-12 08:31 +0200
    Re: can't throw bob smith <bob@coolfone.comze.com> - 2012-09-12 11:40 -0700
      Re: can't throw Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-12 15:50 -0400
      Re: can't throw Lew <lewbloch@gmail.com> - 2012-09-12 12:52 -0700
        Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-12 23:24 +0200
          Re: can't throw Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-09-12 15:10 -0700
            Re: can't throw Robert Klemme <shortcutter@googlemail.com> - 2012-09-13 23:32 +0200
    Re: can't throw Arne Vajhøj <arne@vajhoej.dk> - 2012-09-12 18:06 -0400
  Re: can't throw Roedy Green <see_website@mindprod.com.invalid> - 2012-09-12 20:55 -0700

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