Using jarjarlinks to include only used classes in a jar

I have an application that makes use of about 20 external jar files. In order to package everything up into a single file for distribution, I've been unjaring all the externals into a particular directory and then rejaring it all up into one jar. The end result is about 2MB in size. I want to use jarjarlinks to cut down the size of the distribution jar, but I can't find any examples on how to do what I want.

Essentially, I want to only take from the external jars, the classes that I am using and discard all the rest. Can jarjarlinks d开发者_JAVA百科o that? If not, is there some other utility that anyone would recommend?

My sources so far:

http://code.google.com/p/jarjar/wiki/GettingStarted

http://jonasboner.com/2005/12/09/stay-out-of-jar-hell-with-jar-jar-links.html

http://sixlegs.com/blog/java/dependency-killer.html

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You could also use a tool called autojar.

Regarding the manifest file, you can add one with the -e option of the jar command once the jar is packaged:

jar -uvfe myjar.jar full.name.of.class.with.main.method