Abstraction in Java

What is Abstraction: Abstraction means hiding implementation details and showing only essential features to the user. Why Do We Need Abstraction? To improve security To hide unnecessary implementation To improve maintainability How Abstraction is Achieved in Java? It can be achieved using Abstract classes If a class contains at least one abstract method, then the class should be declared with the abstract keyword. It may have an abstract method, a non-abstract method, a constructor, and a variable Static methods are allowed What can't be applied: -Can't create an object for an abstract class -Can't initialize instance value because object creation is restricted. -Abstract Method Cannot Be Private, Because abstract methods must be overridden in a child class. -Abstract Method Cannot Be Final