How can I replace a class file in jar files?

Question

A coworker of mine wrote a class. His class uses my class. Rather than tell the JVM where my class lives every time his class is compiled, he packaged both classes into a ja

Answer 1

In Eclipse i think it should be enough to export your code as jar file.

http://viralpatel.net/blogs/create-jar-file-in-java-eclipse/

So basically you get the old jar, extract, load as project in eclipse and export as jar file. And you're done.