My application uses deployJava,launchWebstartApplication(url) to launch a webstart application.
Apple silently deactivate Java plugin when the plugin is not used for a period of time. When that happen, deployJava,launchWebstartApplication(url) is no longer working and no error is displayed.
To get the plugin to work again, the user need to go to http://www.java.com/en/download/testjava.jsp (or a page that contain an applet) to re-activate the plugin.
So my question is how can I detect if Java plugin is deactivated and inform the user about this?