If I simply move the jar file from �classes� to �cert� and then load runme.jar and the code directory into the main JAR file, will it be OK? I suspect that the internal sub directory structure may be affected by moving the runme.jar. Am I worrying needlessly?
Also, don't forget that you're not supposed to have a directory called classes with all your compiled classes in your main JAR.
jar cvf target\runme.jar .
As for your question, Michael. The Manifest file is used to tell the system where to find the Main method that starts the application. Without it the application will not start when you type: