Most introductory Java texts take an implementation-centric stab at how to use interfaces and abstract classes. However, few provide a clear design distinction for choosing between these two ...

The difference between abstract classes and interfaces has long vexed Java developers. Find out how Java 8's default methods introduce both new complexity and new options to that familiar ...

I'm trying to model some data in code and i'm a bit confused on what should be an abstract class vs an interface, and why i can't override an abstract property with a property of an inherited type ...

Classes Classes are just like Java classes, with member functions and variables. Scala uses Traits, which are like Java interfaces and abstract classes. class Cat (var breed: String) { def whatBreed() ...

However, there are collection classes in Java that act like a Java array but resize themselves automatically. Any class that extends the List interface expands dynamically. Java arrays do not expand ...