Although Java prevents a developer from extending more than one class, a simple trick can be used to simulate multiple inheritance. I have used this technique in both a Swing application and a Web ...

A Java class inherits these methods and can override any method that’s not declared final. For example, the non- final toString() method can be overridden, whereas the final wait() methods cannot.

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 ...