Re-compile a Java Class from Jar

Question

I have an executable jar that has one class file with a wrong value. I requested that file from the author and corrected the value.

Now I want to compile it and add

Answer 1

I'd try this approach (and it should work, unless the 'debugged' class doesn't introduce a new error):

1. create a new jar by taking the old one and deleting the classfile that you want to replace
2. compile the corrected java file and make sure that the modified jar is on the classpath
3. add the newly compiled classfile to the jar

This should work. If not - ask the author for a new complete library.