Add a description, image, and links to the user-defined-exception topic page so that developers can more easily learn about it.

Even though exception handling is common and every introductory Java course covers it, I still don't think we really know how to do it well. It is almost as if the general concept is still evolving ...

Error handling, also called exception handling, is a big part of Java, but it’s also one of the more divisive elements. Exception handling allows a developer to ...