launch Java Web Start

Instructions to launch from Application Cache Viewer

1. Go to Start > Settings > Control Panel > Double click on the Java icon. The Java Control Panel will start.
2. Click on the General tab
3. Click on the View button from the Temporary Internet Files section
4. Double click on the respective application from the list that you want to launch

From command prompt

You can also launch an application from a command prompt by typing javaws jnlp_url where jnlp_url is a url to the jnlp file of the application.

1. Go to Start > Run > type command
   A command prompt window will appear.
2. Type javaws url_of_jnlp

REF: https://www.java.com/download/faq/java_webstart.xml

https://docs.oracle.com/javase/7/docs/webnotes/tsg/TSG-Desktop/html/plugin.html