Paul Philion wrote:
> James Duncan Davidson wrote:
> > Obviously this isn't useful as being able to double click on a jar file
> > and launch an included app is a good thing.
>
> This may be a stupid question, but can a .jar file be "clicked on" by
> any other platform than Windows? How do I "click on" a .jar file in
> Linux?
>
In Linux 2.2 kernels, there is a configuration option that links particular
file formats to the corresponding executable interpreters -- thus, you can
link .jar files to the Java interpreter, .bas files to a Basic interpreter, or
whatever. I don't recall of the top of my head where it is, but it's in a new
features list I saw recently.
With Linux window managers, you've got the same sorts of ability to double
click apps in the Explorer-analog, or on the desktop, that you do with
Windows.
>
> > Being able to double click
> > on a war file and have your servlet/web-app development tool open it up
> > is a good thing.
>
> Again, how do I "click on" a .war file in Linux, using a command line? I
> may be old fashioned, but I do everything with "make".
>
Well, you don't double click in Windows either then, right? :-)
Actually, the association mentioned earlier lets you type the name of the jar
file itself as the executable (as long as you've set the "x" permissions bit)
even from the command line.
>
> > File extensions, especially on Windows, are the
> > differentiator between file types and what should be done with them.
>
> Perhaps that should read "only on Windows". Lunix, Solaris, HP-UX and
> other versions of Unix that I am familiar with don't rely on file
> extentions (though certain applications, like some graphical file
> system, do). I do remember something about "magic numbers" under Unix.
> Further, the Mac uses a completely different scheme for associating
> files with applications, based on resources.
>
> Given only Windows relies on file name extention, it seems that making
> file extention significant is not cross platform. Thus it does not
> belong in a platform-independant specification.
>
Have you looked at how you configure MIME types in most web servers? It's
almost always by file extension, so the same problem exists there.
For what it's worth, Unix systems have always tried to be smarter about file
types (the magic number lookup), but you would need it to un-jar a JAR file,
and check for the appropriate WEB-INF files and contents, to tell the
difference between a plain old JAR and a web archive. This level of
understanding of the file format seems pretty unlikely to be built into any OS
any time soon.
>
> Just my opinion,
>
> - Paul Philion
>
Craig
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