Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...

Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance. Topics Spotlight: New Thinking about Cloud ...

For example, suppose the subclass contains x = 2;, and one superclass declares x to be of integer type, whereas the other superclass declares x to be of double-precision floating-point type.