To create an executable JAR file type:

jar cmf myManifestFile myJarFile *.class

This will make a jar file of all the .class files in the directory.


The manifest file must contain the line:

Main-Class: CodeHelp

(for this program) where CodeHelp contains the main executable class.
The manifest file used here is called MANIFEST.MF

To build the jar file for CodeHelp, use the following line:
jar cmf MANIFEST.MF CodeHelp.jar *.class