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Compare inheritance and composition, the two fundamental ways to relate Java classes, then practice debugging ClassCastExceptions in Java inheritance.
Inheritance is problematic because it breaks encapsulation. You will recall from Java 101: Classes and objects in Java that encapsulation refers to combining constructors, fields, and methods into ...
A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...