How to extract and separate one jar file into several?

Question

Say I have a .jar file Test.jar which which includes a.jar and b.jar as the dependency.

I want to achieve following:

• make new jar, so that it doesn't contain a.jar and b.jar and while launching from command line, pass them as arguments. ie java -jar Test.jar -cp "a.jar; b.jar"

Answer 1

You could extract your Test.jar into one directory, move the a.jar and b.jar out to a separate directory and then repack the Test.jar back:

jar x Test.jar
mv <path to a.jar> <new path>
.. - do same for b.jar
jar cf Test.jar -C <classes dir>