Abstract class : A class which is declared as abstract is known as an abstract class.
Use of abstract class : Abstract class is used to provide common method implementation to all the sub classes or to provide default implementation.
Abstract method: A method which is declared as abstract and does not have implementation is known as an abstract method.
abstract class in java, use of abstract class in java, abstract method, abstract method in java, use of abstract method in java, abstraction in java, abstraction in oops, types of abstraction in java, rules of abstraction in java