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 ...

Basic Concepts ArrayList: A resizable array that can grow or shrink as needed. Interfaces: A contract that specifies what methods a class must implement. Abstract Classes: A partial implementation of ...

A class which is declared with the abstract keyword is known as an abstract class in Java. It can have abstract and non-abstract methods (method with the body). Before learning the Java abstract class ...