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From: jsa@alexandria (Jon S Anthony)
Subject: Re: Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation)
Date: 1996/10/16
Date: 1996-10-16T00:00:00+00:00	[thread overview]
Message-ID: <JSA.96Oct16173655@alexandria> (raw)
In-Reply-To: Dz2B9H.9HD.0.-s@inmet.camb.inmet.com

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In article <Dz8znD.Fpt@thomsoft.com> kst@thomsoft.com (Keith Thompson) writes:

> In <JSA.96Oct11152501@alexandria> jsa@alexandria (Jon S Anthony) writes:
> [...]
> > But *languages* don't have GC.  Implementations of them do.  Even
> > Meyer says little about GC in ETL - just that all *implementations*
> > are *expected* to have it.
> 
> That's not *quite* correct.  It's admittedly difficult to define
> garbage collection in a formal language definition, but the Java
> definition at least attempts to do so.  Here's paragraph 20.16.9
> of The Java Language Specification, version 1.0 (available at
> <http://java.sun.com/doc/language_specification.html>).
> 
>         20.16.9 public void gc()
> 
>         Calling this method suggests that the Java Virtual Machine expend
>         effort toward recycling discarded objects in order to make the
>         memory they currently occupy available for quick reuse. When
>         control returns from the method call, the Java Virtual Machine
>         has made a best effort to recycle all discarded objects. (The
>         name gc stands for "garbage collector.")
> 
>         The Java runtime system will perform this recycling process
>         automatically as needed, in a separate thread, if the gc method
>         is not invoked explicitly.
> 
>         See also the method gc (�20.18.12) of class System, which is
>         the conventional and convenient means of invoking this method.
> 
> This does refer to the "Java Virtual Machine", but I don't think there's
> any requirement that the JVM be implemented via the usual byte code
> interpreter.

But the point is that it is talking about the JVM, _not_ JTL.  The JVM
is about a particular implementation.  Moreover, "suggests", "expend
effort toward", "made a best effort", etc. sounds a lot like "expected
to have".


> Even for a Java compiler that generates machine code directly, the
> runtime system has to provide a JVM implementation as specified in
> the language specification.  I think.

Where is this stated?  Even if true, I don't see the relevance.

/Jon



-- 
Jon Anthony
Organon Motives, Inc.
Belmont, MA 02178
617.484.3383
jsa@organon.com





  parent reply	other threads:[~1996-10-16  0:00 UTC|newest]

Thread overview: 250+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1996-10-08  0:00 Once again, Ada absent from DoD SBIR solicitation Gregory Aharonian
1996-10-08  0:00 ` Gandalf
1996-10-09  0:00 ` Bill Nielsen
1996-10-09  0:00   ` Stanley R. Allen
1996-10-09  0:00     ` C++ Standardization (was: Once again, Ada absent from DoD SBIR solicitation) David Shochat
1996-10-10  0:00       ` Robert Dewar
1996-10-10  0:00         ` David Shochat
1996-10-20  0:00           ` Richard Riehle
1996-10-20  0:00             ` nasser
1996-10-21  0:00               ` Shayne Flint
1996-10-21  0:00                 ` Robert A Duff
1996-10-21  0:00                   ` Robert Dewar
1996-10-22  0:00                   ` Ken Garlington
1996-10-22  0:00                   ` Shayne Flint
1996-10-22  0:00                     ` Robert A Duff
1996-10-22  0:00               ` Rush Kester
1996-10-11  0:00         ` Ed Falis
1996-10-11  0:00           ` Robert Dewar
1996-10-12  0:00             ` Kevin D. Heatwole
1996-10-12  0:00               ` Robert Dewar
1996-10-13  0:00                 ` Larry Kilgallen
1996-10-13  0:00             ` Ed Falis
1996-10-11  0:00       ` Dave Wood
1996-10-11  0:00         ` Dave Wood
1996-10-17  0:00         ` Garbage Collection in Ada Thomas Kendelbacher
1996-10-10  0:00     ` Once again, Ada absent from DoD SBIR solicitation Mike Stark
1996-10-10  0:00       ` Stanley R. Allen
1996-10-11  0:00         ` Mitch Gart
1996-10-11  0:00           ` Ken Garlington
1996-10-11  0:00           ` Robert Dewar
1996-10-14  0:00             ` Mitch Gart
1996-10-14  0:00               ` Ken Garlington
1996-10-14  0:00           ` Norman H. Cohen
1996-10-14  0:00             ` Bevin R. Brett
1996-10-10  0:00     ` Mitch Gart
1996-10-10  0:00       ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Brian Rogoff
1996-10-10  0:00         ` Dave
1996-10-11  0:00           ` Robert Dewar
1996-10-12  0:00             ` davedave
1996-10-12  0:00               ` Robert Dewar
1996-10-13  0:00               ` Larry Kilgallen
1996-10-11  0:00           ` Stephen Leake
1996-10-11  0:00             ` Dave
1996-10-11  0:00               ` Robert Dewar
1996-10-12  0:00                 ` Dave
1996-10-12  0:00                   ` Robert Dewar
1996-10-14  0:00                   ` Keith Thompson
1996-10-11  0:00           ` Tucker Taft
1996-10-14  0:00             ` Brian Rogoff
1996-10-15  0:00               ` Mitch Gart
1996-10-15  0:00                 ` Larry Kilgallen
1996-10-15  0:00                   ` Mark A Biggar
1996-10-16  0:00                 ` Brian Rogoff
1996-10-28  0:00                 ` Kenneth Almquist
1996-10-29  0:00                   ` Invoking parental methods (was: Java vs Ada 95) Larry Kilgallen
1996-10-31  0:00                     ` Kenneth Almquist
1996-10-31  0:00                       ` Larry Kilgallen
1996-11-05  0:00                         ` Mitch Gart
1996-11-05  0:00                           ` Larry Kilgallen
1996-11-09  0:00                             ` Joel VanLaven
1996-11-05  0:00                           ` Tucker Taft
1996-11-05  0:00                             ` Larry Kilgallen
1996-11-06  0:00                               ` Robert A Duff
1996-11-06  0:00                                 ` Larry Kilgallen
1996-11-06  0:00                             ` Robert I. Eachus
1996-11-07  0:00                               ` David Wheeler
1996-11-06  0:00                             ` Mitch Gart
1996-11-08  0:00                             ` Robert I. Eachus
1996-11-08  0:00                             ` Jon S Anthony
1996-10-15  0:00               ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Mike Stark
1996-10-15  0:00                 ` Robert Dewar
1996-10-16  0:00                   ` Mike Stark
1996-10-17  0:00                     ` Robert A Duff
1996-10-17  0:00                 ` Why no Propagates? Matthew Heaney
1996-10-18  0:00                   ` Robert Dewar
1996-10-18  0:00                   ` Norman H. Cohen
1996-10-18  0:00                     ` Robert Dewar
1996-10-18  0:00                   ` Robert A Duff
1996-10-15  0:00               ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Robert A Duff
1996-10-15  0:00                 ` Robert Dewar
1996-10-15  0:00                 ` Portability of Arithmetic (was: Java vs Ada 95) Larry Kilgallen
1996-10-16  0:00                   ` Robert A Duff
1996-10-16  0:00                     ` Robert Dewar
1996-10-17  0:00                       ` Robert A Duff
1996-10-17  0:00                         ` Larry Kilgallen
1996-10-18  0:00                           ` Robert A Duff
1996-10-17  0:00                         ` Robert Dewar
1996-10-18  0:00                           ` Norman H. Cohen
1996-10-18  0:00                             ` Robert Dewar
1996-10-18  0:00                               ` Brian R. Hanson
1996-10-19  0:00                                 ` Robert Dewar
1996-10-19  0:00                                   ` Larry Kilgallen
1996-10-22  0:00                                     ` Once again, Ada absent from DoD SBIR solicitation Dale Stanbrough
1996-10-27  0:00                                       ` Robert Dewar
1996-10-21  0:00                                   ` Portability of Arithmetic (was: Java vs Ada 95) Norman H. Cohen
1996-10-21  0:00                                     ` Robert Dewar
1996-10-21  0:00                               ` Norman H. Cohen
1996-10-21  0:00                                 ` Robert Dewar
1996-10-22  0:00                                   ` Larry Kilgallen
1996-10-23  0:00                                     ` Robert Dewar
1996-10-23  0:00                                       ` Larry Kilgallen
1996-10-23  0:00                                   ` Norman H. Cohen
1996-10-21  0:00                               ` Lance Kibblewhite
1996-10-18  0:00                           ` Larry Kilgallen
1996-10-18  0:00                             ` Robert A Duff
1996-10-17  0:00                     ` Stephen Leake
1996-10-17  0:00                       ` Robert A Duff
1996-10-17  0:00                         ` Robert Dewar
1996-10-17  0:00                         ` Larry Kilgallen
1996-10-18  0:00                           ` Robert A Duff
1996-10-17  0:00                 ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Alan Brain
1996-10-17  0:00                   ` Robert Dewar
1996-10-17  0:00                   ` Robert A Duff
1996-10-18  0:00                   ` Keith Thompson
1996-10-20  0:00                     ` Alan Brain
1996-10-24  0:00                 ` Robert I. Eachus
1996-10-16  0:00             ` Brian Rogoff
1996-10-16  0:00               ` Robert Dewar
1996-10-17  0:00                 ` Robert A Duff
1996-10-17  0:00                   ` Robert Dewar
1996-11-22  0:00                 ` Van Snyder
1996-11-25  0:00                   ` Java vs Ada vs Inferno, floating point arithmetic Anssi Porttikivi
1996-10-16  0:00             ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Jon S Anthony
1996-10-16  0:00             ` Brian Rogoff
1996-10-18  0:00           ` Why no Propagates? Michel Gauthier
1996-10-22  0:00             ` Richard A. O'Keefe
1996-10-23  0:00           ` Michel Gauthier
1996-10-11  0:00         ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Mitch Gart
1996-10-11  0:00       ` Jon S Anthony
1996-10-11  0:00       ` Jon S Anthony
1996-10-12  0:00         ` Robert Dewar
1996-10-14  0:00           ` Mitch Gart
1996-10-14  0:00           ` Brian R. Hanson
1996-10-14  0:00         ` Keith Thompson
1996-10-15  0:00           ` Dale Stanbrough
1996-10-15  0:00             ` Brian R. Hanson
1996-10-20  0:00           ` nasser
1996-10-12  0:00       ` davedave
1996-10-12  0:00         ` Robert Dewar
1996-10-16  0:00           ` Jon S Anthony
1996-10-16  0:00           ` Jon S Anthony
1996-10-14  0:00       ` Jon S Anthony
1996-10-14  0:00       ` Brian Rogoff
1996-10-14  0:00       ` Jon S Anthony
1996-10-14  0:00         ` Robert Dewar
1996-10-15  0:00           ` Robert A Duff
1996-10-15  0:00             ` Larry Kilgallen
1996-10-16  0:00               ` Lars Farm
1996-10-16  0:00                 ` Robert Dewar
1996-10-17  0:00           ` Why no Free? Matthew Heaney
1996-10-18  0:00             ` John Herro
1996-10-19  0:00               ` John Herro
1996-10-18  0:00             ` Robert Dewar
1996-10-18  0:00             ` Robert A Duff
1996-10-14  0:00       ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Jon S Anthony
1996-10-14  0:00       ` Jon S Anthony
1996-10-15  0:00       ` Robert I. Eachus
1996-10-15  0:00         ` Robert Dewar
1996-10-15  0:00       ` Brian Rogoff
1996-10-15  0:00       ` Robert I. Eachus
1996-10-16  0:00       ` Jon S Anthony
1996-10-16  0:00       ` Jon S Anthony
1996-10-16  0:00       ` Jon S Anthony
1996-10-17  0:00         ` Robert Dewar
1996-10-17  0:00         ` Robert Dewar
1996-10-16  0:00       ` Jon S Anthony [this message]
1996-10-18  0:00         ` Keith Thompson
1996-10-16  0:00       ` Samuel T. Harris
1996-10-16  0:00       ` Jon S Anthony
1996-10-18  0:00       ` Jon S Anthony
1996-10-18  0:00       ` Jon S Anthony
1996-10-18  0:00       ` Jon S Anthony
1996-10-29  0:00       ` Kenneth Almquist
1996-10-29  0:00         ` Robert Dewar
1996-10-31  0:00           ` Kenneth Almquist
1996-10-29  0:00       ` Robert I. Eachus
1996-10-29  0:00       ` Jon S Anthony
1996-10-30  0:00       ` Stephen Leake
1996-10-31  0:00         ` Lars Farm
1996-10-31  0:00       ` Kenneth Almquist
1996-10-31  0:00       ` Jon S Anthony
1996-11-01  0:00       ` Robert I. Eachus
1996-11-01  0:00         ` Robert A Duff
     [not found]           ` <55gkch$gg6@fozzie.sun3.iaf.nl>
1996-11-03  0:00             ` Robert A Duff
1996-11-03  0:00               ` Robert Dewar
1996-11-04  0:00                 ` Larry Kilgallen
1996-11-04  0:00                   ` Robert Dewar
1996-11-05  0:00                 ` Fast locking (Was Re: Java vs Ada 95) Geert Bosch
1996-11-06  0:00                   ` Larry Kilgallen
1996-11-06  0:00                     ` Geert Bosch
1996-11-07  0:00                       ` Larry Kilgallen
1996-11-07  0:00                         ` Robert Dewar
1996-11-11  0:00                           ` Norman H. Cohen
1996-11-08  0:00                         ` Geert Bosch
1996-11-06  0:00                     ` Robert Dewar
1996-11-02  0:00         ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Robert Dewar
1996-11-04  0:00         ` Robert I. Eachus
1996-11-05  0:00           ` Larry Kilgallen
1996-11-14  0:00           ` Robert Dewar
1996-11-16  0:00             ` Geert Bosch
1996-11-17  0:00               ` Robert Dewar
1996-11-17  0:00                 ` Robert A Duff
1996-11-18  0:00                   ` Robert Dewar
1996-11-19  0:00                     ` Robert A Duff
1996-11-18  0:00                 ` Norman H. Cohen
1996-11-18  0:00                 ` Geert Bosch
1996-11-22  0:00                   ` Robert Dewar
1996-11-16  0:00             ` Robert A Duff
1996-11-16  0:00               ` Robert Dewar
1996-11-17  0:00                 ` Unbounded strings (Was: Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation)) Robert A Duff
1996-11-18  0:00                   ` Robert Dewar
1996-11-19  0:00                     ` Joel VanLaven
1996-11-23  0:00                       ` Robert Dewar
1996-11-19  0:00                     ` Robert A Duff
1996-11-23  0:00                       ` Robert Dewar
1996-11-24  0:00                         ` Robert A Duff
1996-11-25  0:00                         ` Norman H. Cohen
1996-11-27  0:00                           ` Robert Dewar
1996-11-21  0:00                   ` Robert I. Eachus
1996-11-24  0:00                     ` Robert Dewar
1996-11-24  0:00                       ` Fergus Henderson
1996-11-24  0:00                         ` Robert Dewar
1996-11-25  0:00                       ` Kevin D. Heatwole
1996-11-25  0:00                         ` Robert A Duff
1996-11-26  0:00                           ` Kevin D. Heatwole
1996-11-26  0:00                             ` Robert A Duff
1996-11-26  0:00                               ` Larry Kilgallen
1996-11-27  0:00                               ` Norman H. Cohen
1996-11-29  0:00                                 ` Robert A Duff
1996-11-29  0:00                                 ` Fergus Henderson
1996-11-27  0:00                               ` Robert Dewar
1996-11-26  0:00                         ` Geert Bosch
1996-11-26  0:00                           ` Robert Dewar
1996-11-25  0:00                   ` Robert I. Eachus
1996-11-20  0:00                 ` Jon S Anthony
1996-11-24  0:00                   ` Robert Dewar
1996-11-06  0:00         ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Robert I. Eachus
1996-10-11  0:00     ` Ada and the DoD HLA (was: " John Cosby
1996-10-13  0:00     ` Java vs Ada 95 (Was " Hannes Haug
1996-11-03  0:00     ` Hannes Haug
1996-11-06  0:00     ` Fast locking (Was Re: Java vs Ada 95) Hannes Haug
1996-11-06  0:00     ` Hannes Haug
1996-10-11  0:00   ` Once again, Ada absent from DoD SBIR solicitation Matthew M. Lih
1996-10-18  0:00     ` Rush Kester
1996-10-21  0:00   ` C++ Standardization (was: Once again, Ada absent from DoD SBIR solicitation) David Emery
1996-10-10  0:00 ` Jon S Anthony
1996-10-11  0:00 ` Jon S Anthony
1996-10-22  0:00 ` Tarjei Jensen
1996-10-22  0:00   ` C++ Standardization (was: Once again, Ian Ward
1996-11-01  0:00 ` Java vs Ada 95 (Was Re: Once again, Ada absent from DoD SBIR solicitation) Jon S Anthony
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