Good MVC descriptions

https://stackoverflow.com/questions/5217611/the-mvc-pattern-and-swing
https://examples.javacodegeeks.com/core-java/java-swing-mvc-example/
http://www.ssaurel.com/blog/learn-to-make-a-mvc-application-with-swing-and-java-8/
http://www.austintek.com/mvc/
 https://www.leepoint.net/GUI/structure/40mvc.html