1 I tried employing a manifest and entry stage without success, right up until I attempted making The category file first while you described. jar cfm OlivePressApp.jar Manifest.txt com/lynda/olivepress/Main.class com/lynda/olivepress/* Optionally, a package deal inside of a JAR file is often sealed, which suggests that every one courses defined in https://rolf09763.sasugawiki.com/6417697/top_jar_secrets