Creating runnable .jar with dependant libraries?

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Bas - 04 May 2006 16:28 GMT

Hi,

I'm trying to create a jar so the end user can simply start the
application like this:

java -jar somejar.jar

This is all fine except how can I embed libraries (in jars) in this jar
file and have them appear in the classpath? Or do I need to unjar those
libraries individually and jar them into the new archive?

My brain must be f*cked up after creating .war's and .ear's for too
long ;)

Cheers,

Bas.

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Rogan Dawes - 04 May 2006 16:42 GMT

> Hi,
>
[quoted text clipped - 13 lines]
>
> Bas.

Couple of options

put your library jars in the classpath in the manifest, and place the
jars themselves in a directory relative to your application jar. NOT in
the jar itself!

Alternatively, look for One-Jar or UberJar which can do what you are
looking for.

A third possibility is to use something like Proguard which will package
up all of your required classes into a single monolithic jar (but it
breaks if the jars need to be signed, etc)

Rogan

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Roedy Green - 04 May 2006 20:23 GMT

>This is all fine except how can I embed libraries (in jars) in this jar
>file and have them appear in the classpath?

Read up on the manifest. You can list aux jars in there with relative
urls.

See http://mindprod.com/jgloss/jar.html
http://mindprod.com/jgloss/jar.exe.html

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Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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Creating runnable .jar with dependant libraries?

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