Run the jar tool without arguments to see its usage. You pass it the -M option to create a JAR without a manifest. You won't be able to run the JAR file with java -jar, but you will still be able ...

Want to know how to set up a Minecraft server with your friends? Here's all you need to know with step-by-step instructions.

Couldn't you create a .jar file with all your classes, create a manifest.txt and then shortcut to that jar file?

A JAR file is an archive file but is more than a file compression format. Here's how to open, run, or execute JAR files.