13 Abstract class
A class that is declared with the abstract keyword is known as an abstract class in Java. It can have abstract and non-abstract methods. If a class contains any abstract method then the class is declared as an abstract class. An abstract class is never instantiated. It is used to provide abstraction. abstract class className { } Before learning the abstract class, let’s understand the abstraction in Java first. 13.1 | Abstraction Abstraction is a process of hiding the implementation details and showing only functionality to the user. let’s take an example, We send…