How to open .class file?

Question

Java

There are several .class files, I need to change several values ​​inside, how can I open such a file and save it back to .class?

Answer 1

In general, no way. It's not much easier than opening the .exe file, changing a few values, and saving back. You can try the decompiler as suggested in the other question, but don't expect it to be easy.

Answer 2

Use a decompiler - get a .java file
Change the values ​​in it and recompile with javac.