Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes ...

In Java, nested classes ... and the name of either a base class or an interface that is implemented by the anonymous class: // subclass the base class abstract class Base { // members ...

However, seasoned Java developers know that sometimes the simplest of language constructs can turn out to be the most powerful, as is the case with object models designed with abstract classes and ...