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

You probably have to specify the JAR file itself and not just the directory it resides in.

javac file.java -classpath C:\folder\where\jar\is\the_jar_file.jar