ImageJ does not add new plugins to the menu

Posted by Paul Cholerzynski on Mar 28, 2017; 10:43am
URL: http://imagej.273.s1.nabble.com/ImageJ-does-not-add-new-plugins-to-the-menu-tp5018403.html

Hi,
I am working on a new project where I need to create a plugin for ImageJ using NetBeans.
My problem is that ImageJ does not see my test plugins in its menu.

I've made a general reinstalation of NetBeans, JDK, JRE and ImageJ itself.
Then I created a new plugin using the guide: https://www.youtube.com/watch?v=Ac-6gJ2eRb0 .
This one worked perfectly, but I wanted the plugin to be in the menu so I've put the .java, .class, .Jar files in the plugins folder, made sure that there is an "_" underscore in the .class file and run ImageJ.
Unfortunately with no effect. Then I tried using the "Compile and Run" and "Install" options - still no result.
I've also searched this forum but for now didn't find any working solution.

If anybody has any ideas I am all ears.