Checking if two jar classes are the same

Checking if two jar classes are the same

So Im trying to figure out if two .jars have the same .class file name.
I've done this -
cat jarFilePaths | xargs -n 1 jar tf | grep 'joda'
What do I do to see if two of these have the same .class file name.
jarFilePaths is a list of file paths of jars.