Скачать с ютуб #61 Abstract Keyword in Java в хорошем качестве

#61 Abstract Keyword in Java

Check out our courses: Enterprise Java Spring Microservices: https://go.telusko.com/enterpriseJava Coupon: TELUSKO10 (10% Discount) Master Java Spring Development : https://bit.ly/java-spring-cloud Coupon: TELUSKO20 (20% Discount) Udemy Courses: Java:- https://bit.ly/JavaUdemyTelusko Spring:- https://bit.ly/SpringUdemyTelusko Java For Programmers:- https://bit.ly/javaProgrammers For More Queries WhatsApp or Call on : +919008963671 website : https://courses.telusko.com/ In this lecture we will learn: - What is Abstraction? - Abstract method in Java - Abstract class in Java - Abstract vs Concrete classes #1 Abstraction is a process of hiding the implementation details and showing only functionality to the user. #2 Abstract method:- - Instead of defining the method, we can declare the method. - If we put a semicolon at the end of a method, it means that you only declare the method like: public void drive(); - This method does not contain any features and you will not be able to create an object of it. - You need to add an abstract keyword to only declare a method. #3 Abstract class:- - Abstract methods can only be defined in an abstract class. - We need to add an abstract keyword before a class to make it an abstract class. - Objects of an abstract class can not be created. - If you are extending an abstract class, then it is compulsory to define all abstract methods. - It is not necessary that an abstract class should have an abstract method. - Abstract class can have an abstract or a normal method or both. - An abstract class can have more than one abstract method. #4 Concrete class: A class other than an abstract class is known as a concrete class. - An object of a concrete class can be created. Github repo : https://github.com/navinreddy20/Javac... Java:- https://bit.ly/JavaUdemyTelusko Spring:- https://bit.ly/SpringUdemyTelusko More Learning : Java :- https://bit.ly/3x6rr0N Python :- https://bit.ly/3GRc7JX Django :- https://bit.ly/3MmoJK6 JavaScript :- https://bit.ly/3tiAlHo Node JS :- https://bit.ly/3GT4liq Rest Api :-https://bit.ly/3MjhZwt Servlet :- https://bit.ly/3Q7eA7k Spring Framework :- https://bit.ly/3xi7buh Design Patterns in Java :- https://bit.ly/3MocXiq Docker :- https://bit.ly/3xjWzLA Blockchain Tutorial :- https://bit.ly/3NSbOkc Corda Tutorial:- https://bit.ly/3thbUKa Hyperledger Fabric :- https://bit.ly/38RZCRB NoSQL Tutorial :- https://bit.ly/3aJpRuc Mysql Tutorial :- https://bit.ly/3thpr4L Data Structures using Java :- https://bit.ly/3MuJa7S Git Tutorial :- https://bit.ly/3NXyCPu Donation: PayPal Id : navinreddy20 https://www.telusko.com