Groups > comp.lang.java.programmer > #30787

Re: Using jar inside a jar

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From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.java.programmer
Subject	Re: Using jar inside a jar
Organization	Decebal Computing
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Date	Thu, 22 Jan 2015 13:05:11 +0100
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Op Thursday 22 Jan 2015 12:28 CET schreef Nigel Wade:

> On 22/01/15 10:48, Cecil Westerhof wrote:
>> To compile a program I use:
>> javac -classpath ../ShowMemory/ShowMemory.jar \
>> -Xlint:all \
>> -Werror \
>> PanelTools.java
>>
>> To create a jar I use:
>> jar   -cvfm PanelTools.jar \
>> MANIFEST.MF \
>> images \
>> -C ../ShowMemory ShowMemory.jar \
>> *.class
>>
>> The MANIFEST.MF contains:
>> Manifest-Version: 1.0
>> Main-Class: PanelTools
>> Class-Path: ShowMemory.jar
>>
>> But when I execute the program with:
>> java -jar PanelTools.jar &
>>
>> I get: Exception in thread "AWT-EventQueue-0"
>> java.lang.NoClassDefFoundError: nl/decebal/utilities/ShowMemory
>>
>> What am I doing wrong?
>>
>
> Java needs to know where to locate ShowMemory.jar. The only
> information it has is the Class-Path: entry in MANIFEST.MF. This
> entry only has a bare filename, so Java looks for it in the same
> directory as the jar file it is executing.
>
> You have various options, none of which are perfect. 1) You can
> embed an absolute path in the manifest. Ok if the dependency jar
> will always be in the same place. 2) You can use a relative path in
> the manifest. Better, but still only works if the jar and the
> dependency will always have the same relative locations. 3)
> Basically option 2, but during the build process copy all dependency
> jar's to a fixed location relative to the main jar (e.g. lib/), and
> use that relative path in the manifest. Best option, as it means you
> can package the jar and its dependency tree if you need to relocate
> it.

It is not possible to use the jar that I put into the jar file? I
would prefer to use only one jar file. But if that is not possible, I
will go for option 3.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

Thread

Using jar inside a jar Cecil Westerhof <Cecil@decebal.nl> - 2015-01-22 11:48 +0100
  Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-22 11:28 +0000
    Re: Using jar inside a jar Cecil Westerhof <Cecil@decebal.nl> - 2015-01-22 13:05 +0100
      Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-22 13:46 +0100
        Re: Using jar inside a jar Jeff Higgins <jeff@invalid.invalid> - 2015-01-22 08:15 -0500
          Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-22 16:30 +0100
        Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-22 14:18 +0000
          Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-22 16:29 +0100
            Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-23 11:10 +0000
              Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-23 13:12 +0100
                Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-23 15:46 +0000
                Re: Using jar inside a jar Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-01-23 11:18 -0500
                Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-23 22:42 +0100
                Re: Using jar inside a jar Jerry Stuckle <jstucklex@attglobal.net> - 2015-01-23 17:02 -0500
                Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-24 14:14 +0100
                Re: Using jar inside a jar Martin Gregorie <martin@address-in-sig.invalid> - 2015-01-24 15:33 +0000
                Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-26 09:28 +0000
                Re: Using jar inside a jar Joerg Meier <joergmmeier@arcor.de> - 2015-01-26 21:14 +0100
                Re: Using jar inside a jar Jerry Stuckle <jstucklex@attglobal.net> - 2015-01-26 15:23 -0500
                Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-28 14:19 +0000
              Re: Using jar inside a jar Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2015-01-24 11:46 +0000
        Re: Using jar inside a jar Wayne <nospam@all.invalid> - 2015-01-23 00:47 -0500
        Re: Using jar inside a jar Silvio <silvio@internet.com> - 2015-01-23 12:28 +0100
      Re: Using jar inside a jar Nigel Wade <nmw@ion.le.ac.uk> - 2015-01-22 14:18 +0000

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