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

A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance ...

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 ...