Exception in thread "main" java.lang.ClassCastException: class Superclass cannot be cast to class Subclass (Superclass and Subclass are in unnamed module of loader 'app') at BadDowncast.main ...

If the superclass has a constructor receiving at least one parameter, you must invoke this super constructor in the subclass passing the required parameter. Learn more about Java inheritance ...

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work. ... objects -- this adds complexity and could ...