Groups > comp.lang.java.programmer > #8509

Re: loading dll within a jar

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!news.cgarbs.de!news.addix.net!feed.news.schlund.de!schlund.de!news.online.de!not-for-mail
From	Philipp Kraus <philipp.kraus@flashpixx.de>
Newsgroups	comp.lang.java.programmer
Subject	Re: loading dll within a jar
Date	Tue, 4 Oct 2011 11:19:59 +0200
Organization	1&1 Internet AG
Lines	41
Message-ID	<j6ej3v$dlr$1@online.de> (permalink)
References	<j6d70q$24c$1@online.de> <201110032353253223-angrybaldguy@gmailcom>
NNTP-Posting-Host	p3ee2964c.dip0.t-ipconnect.de
Mime-Version	1.0
Content-Type	text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding	8bit
X-Trace	online.de 1317719999 14011 62.226.150.76 (4 Oct 2011 09:19:59 GMT)
X-Complaints-To	abuse@einsundeins.com
NNTP-Posting-Date	Tue, 4 Oct 2011 09:19:59 +0000 (UTC)
User-Agent	Unison/2.1.5
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:8509

Show key headers only | View raw

On 2011-10-04 05:53:25 +0200, Owen Jacobson said:

> On 2011-10-03 20:47:22 +0000, Philipp Kraus said:
> 
>> Hello,
>> 
>> is there a way to load a DLL library that is stored within a Jar?
>> At the time I'm using the -Djava.library.path flag but I would like
>> to store the DLL within the Jar and added the path dynamically.
>> 
>> I've found some information about this eg extract the DLL to the
>> temp directory and set the -D option on the main-method.
>> 
>> Can I set also the library path to the java command like the classpath
>> argument? My java classes use the a
>> static { System.loadLibrary("dllname"); }
>> to load the library, so can I add on the static attribute a call for loading
>> the dll within the jar?
>> 
>> Thanks
>> 
>> Phil
> 
> DLL files (and their Unix counterparts) are loaded by the OS's binary 
> image loader, which near-universally expects a program or library to 
> come from a file on the filesystem. A loader that's clever enough to 
> look inside a ZIP file is a rare beast indeed.
> 
> Short answer, no, you can't get there from here. Unpack your .DLL 
> somewhere (java.io.tmpdir, for example) and load it from there. The 
> Java Web Start protocol includes support for native libraries 
> distributed inside JAR files, if you don't want to write the 
> unpack-and-load glue yourself and if your app is appropriate for web 
> start.


Thanks for your answers. I will take a look to the Webstart but I think 
I write my own glue code

Phil

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

Thread

loading dll within a jar Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-03 22:47 +0200
  Re: loading dll within a jar Owen Jacobson <angrybaldguy@gmail.com> - 2011-10-03 23:53 -0400
    Re: loading dll within a jar Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-04 11:19 +0200
    Re: loading dll within a jar Roedy Green <see_website@mindprod.com.invalid> - 2011-10-04 02:33 -0700
      Re: loading dll within a jar Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-10-04 14:19 +0200
  Re: loading dll within a jar Roedy Green <see_website@mindprod.com.invalid> - 2011-10-03 22:28 -0700
  Re: loading dll within a jar Roedy Green <see_website@mindprod.com.invalid> - 2011-10-15 14:20 -0700
  Re: loading dll within a jar Arne Vajhøj <arne@vajhoej.dk> - 2011-10-16 22:38 -0400

csiph-web