[concurrency-interest] java fork-join getting-started notes for beginners <-> Java 7

Nabeel Ali Memon nabeelalimemon at gmail.com
Tue Nov 1 11:57:05 EDT 2011


Both Intellij Idea (10 and 11 EAP) CE  and Netbeans 7 support Java 7 syntax enhancements. Both are free and stable (except the Intellij 11 EAP of course).


Nabeel
 
On Aug 20, 2011, at 11:35 AM, zuxiong lin wrote:

> Or maybe use Eclipse Juno (4.2) M1.
> 
> The best paractice is like Doug .  Run releases without IDE support.
> 
> 
> 
> 2011/8/19 Dan Grossman <djg at cs.washington.edu>
> Thanks, Remi.  My understanding is that it is fine to ignore this
> warning since using the Java ForkJoin Framework does not require any
> language enhancements.  Ignoring this warning is a small price to pay
> for simple standard installation instructions, and, as you note, the
> warning should go away with a near-term release of Eclipse.
> 
> --Dan
> 
> On Thu, Aug 18, 2011 at 1:20 PM, Rémi Forax <forax at univ-mlv.fr> wrote:
> > Eclipse Indigo's compiler is not updated for Java 7,
> > all language enhancements of Java 7 are not recognized,
> > that's why you have this warning, the release 3.7.1 (not yet release) should
> > be Ok,
> > you can already test the compiler behaviour by installing the 3.8M1.
> >
> > Rémi
> >
> > On 08/18/2011 09:56 PM, Doug Lea wrote:
> >>
> >> On 08/16/11 18:00, Dan Grossman wrote:
> >>>
> >>> Short version:
> >>>
> >>> I'm looking for quick confirmation that using the fork-join framework
> >>> with the Java 7 JRE is just as easy as it seems and that I'm pointing
> >>> students to the right stable versions of things.
> >>
> >> I'm still hoping that someone else replies about most of this,
> >> since I normally experimental run releases without IDE support.
> >> But otherwise -- yes, things should Just Work.
> >>
> >> -Doug
> >>
> >>>
> >>> Long version:
> >>>
> >>> Background:
> >>>
> >>> As I've mentioned on this list a couple times, I've developed a
> >>> course-unit for second-year undergraduates that introduces parallelism
> >>> and concurrency using Java and the Fork-Join Framework (though it's
> >>> not really that Java-specific).  At Washington, we've used this unit
> >>> in our required data-structures course for 1.5 years now and it's been
> >>> picked up by 5 other schools so far.  In all, 10 instructors, most
> >>> non-experts in Java, parallelism, or both have used it and they all
> >>> claim success and, "I will do this again."  For more information,
> >>> http://www.cs.washington.edu/homes/djg/teachingMaterials/spac/
> >>>
> >>> One thing that has proven absolutely essential is step-by-step
> >>> instructions suitable for beginners, specialized to just what they
> >>> need: ForkJoinPool, RecursiveTask, RecursiveAction.  This was
> >>> particularly important for Java 1.6.  The url
> >>>
> >>> http://www.cs.washington.edu/homes/djg/teachingMaterials/spac/grossmanSPAC_forkJoinFramework.html
> >>> has these instructions and was last updated a few months ago.  For
> >>> those of you who have not taught undergraduates, let me assure you
> >>> that there are, nonetheless, a mind-boggling number of ways to enter
> >>> -Xbootclasspath/p:jsr166.jar incorrectly. :-)
> >>>
> >>> So what now:
> >>>
> >>> It seems time to update my step-by-step instructions to say:
> >>>   1. Please use Java 7 following steps a, b, c.
> >>>   2. If you really can't, then here are the more complicated steps for
> >>> using Java 6 following steps, d, e, f, g.
> >>>
> >>> In preparation for this, I downloaded JDK 7 onto a [Windows 7, 64-bit]
> >>> machine that has never had Java on it, installed Eclipse IDE for Java
> >>> Developers, indigo release (my instructions prefer but don't mandate
> >>> eclipse), set the Java Project JRE to JavaSE-1.7, and ran the attached
> >>> file.  It Just Worked.  This is So Wonderful and I send my heartfelt
> >>> appreciation to everyone on this list who helped make it happen.
> >>>
> >>> Now my questions -- I think the answers are all 'yes' but this is the
> >>> place to confirm and I'm most concerned about (C):
> >>>
> >>> A. Java 7: Is this the real deal -- the framework will use the
> >>> available processors and, after suitable VM warmup, be the parallel
> >>> execution engine we expect?
> >>>
> >>> B. Installation: Will upgrading on machines that already have Java 6
> >>> be just as seamless?
> >>>
> >>> C. Code: Is the attached file the way to show things to beginners?
> >>> (Note: My point is to show them the reduction explicitly rather than
> >>> using a library method.  This is for pedagogical purposes.  So no
> >>> complaining about that.)
> >>>
> >>> D. Eclipse: When choosing JavaSE1-1.7, Eclipse Indigo release warns,
> >>> "The 1.7 compiler compliance level
> >>>    is not yet supported.  The new project will use a project specific
> >>> compiler compliance level of 1.6".  Am I correct that this can be
> >>> ignored since I'm not using any new /language/ features, just a new
> >>> /library/? (Note: My understanding is there are Eclipse versions
> >>> available with 1.7 compilers, but if we're okay with the most standard
> >>> most stable Eclipse release, this is extremely helpful.)
> >>>
> >>> E: Anything else I can do to make this as bullet-proof for beginners
> >>> as possible?
> >>>
> >>> Thanks!
> >>>
> >>> --Dan
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Concurrency-interest mailing list
> >>> Concurrency-interest at cs.oswego.edu
> >>> http://cs.oswego.edu/mailman/listinfo/concurrency-interest
> >>
> >> _______________________________________________
> >> Concurrency-interest mailing list
> >> Concurrency-interest at cs.oswego.edu
> >> http://cs.oswego.edu/mailman/listinfo/concurrency-interest
> >
> > _______________________________________________
> > Concurrency-interest mailing list
> > Concurrency-interest at cs.oswego.edu
> > http://cs.oswego.edu/mailman/listinfo/concurrency-interest
> >
> 
> _______________________________________________
> Concurrency-interest mailing list
> Concurrency-interest at cs.oswego.edu
> http://cs.oswego.edu/mailman/listinfo/concurrency-interest
> 
> _______________________________________________
> Concurrency-interest mailing list
> Concurrency-interest at cs.oswego.edu
> http://cs.oswego.edu/mailman/listinfo/concurrency-interest

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://cs.oswego.edu/pipermail/concurrency-interest/attachments/20111101/e9196d5a/attachment.html>


More information about the Concurrency-interest mailing list