Updating .class file in jar

Question

I want to update a .class file in a jar with a new one. What is the easiest way to do it, especially in the Eclipse IDE?

Answer 1

1) you can extract the file into a folder called

jarname.jar

and then replace the file in the folder, handy if you are updating the class a lot while debugging

2) you can extract the jar replace the file then the jar it up again

3) Open the jar with 7 zip and drag and drop your new class in to copy over the old one