Shape Inheritance Example in Java This Java program demonstrates abstract classes and inheritance using a base class Shape and two subclasses: Triangle and Rectangle.

An interface in java is a blueprint of a class. It has static constants and abstract methods. The interface in Java is a mechanism to achieve abstraction. There can be only abstract methods in the ...

The Java Tutorial goes on to list bullets for when an abstract class should be considered and for when an interface should be considered. Unsurprisingly, these are derived from the previously ...