[ubuntu] Install/run an application in a jar file

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http://ubuntuforums.org – I have downloaded a jar file vnaj2.8.5b.jar this file is a Linux application for a network analyzer. The jar file contains numerous files. I have java 6 installed. I need help in installing/running this application in Ubuntu 12.04. I can take any individual file within the package and under properties can associate it with java. However, I do not see one executeable file within the application. Thanks for any guidance. (Hardware)