Unpack and repack a JAR file with all of its dependencies

Repacking an unpacked JAR is a little frustrating because of the folder structure

When unpacking with:

jar xvf JAR_NAME.jar

you get a JAR_NAME/ folder

To repack the JAR:

remove old jar

rm JAR_NAME.jar

get inside the folder

cd JAR_NAME

pack the jar referencing the parent folder

jar cf ../JAR_NAME.jar *

and you will end up with the JAR_NAME.jar in the parent folder, where the original was unpacked from, without the first folder level you would get if you had packed the folder itself.