realize that a "war" file typically denotes a Web Application aRchive -- and is used to hold J2EE Web applications that are deployed to and executed from an application server.
a "jar" file typically denotes a Java Application aRchive -- and can be used to hold a J2SE application that you run from the command line, as Annie has shown.
I would think that its confusing if you give a customer a WAR file and tell them to execute it from the command line, instead of having it be deployed to an application server as would be expected of a WAR file. Basically -- I suggest you package your applicatino as a JAR.