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Groups > comp.lang.java.programmer > #27893

Re: Will Java compiled in windows work in Linux?

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Eric Sosman <esosman@comcast-dot-net.invalid> writes:
> On 3/27/2014 1:50 PM, D. Xenakis wrote:

>> First question: If i want to compile from scratch on my machine using
>> their source code unmodificated from here
>> (http://www.traccar.org/source.jsp), would the new generated traccar.run
>> file, have the same hash with "traccar-linux-64-2.7.zip (26-Jan-2014)" ?

>     Possibly not.  If you compile with a different Java version
> than they used, the class file format's version number might be
> different.  If you use different compiler options than they did,
> the class files may contain different kinds and amounts of debugging
> information.  Even if the class files are identical, the archive's
> hash code may be different if you used a different ZIP utility.

I would say they almost certainly have different hash codes.
The zip file format includes not only the contents of each file packed
in the zip, but also the timestamps of each file, and they WILL be
different when you re-compile the classes, even with an identical
computer with identical operating system, jdk and all possible options.

But because a hash code doesn't contain ALL the information of
the file, there is a slight possibility that they might still happen to
have the same hash code.

-- 
Jukka Lahtinen

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Thread

Will Java compiled in windows work in Linux? "D. Xenakis" <sparkdevelopment.social@gmail.com> - 2014-03-27 10:50 -0700
  Re: Will Java compiled in windows work in Linux? Marcel Müller <news.5.maazl@spamgourmet.org> - 2014-03-27 19:15 +0100
  Re: Will Java compiled in windows work in Linux? Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-03-27 14:58 -0400
    Re: Will Java compiled in windows work in Linux? "D. Xenakis" <sparkdevelopment.social@gmail.com> - 2014-03-27 13:04 -0700
    Re: Will Java compiled in windows work in Linux? Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2014-03-27 23:31 +0200
  Re: Will Java compiled in windows work in Linux? Roedy Green <see_website@mindprod.com.invalid> - 2014-03-28 00:16 -0700

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