Abstraction in Java | The Java Series | E - 25 скачать в хорошем качестве

Abstraction in Java | The Java Series | E - 25

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. Happy Java to you! Here's few links for your learning journey: 🖋️ Theoretical Java Playlist:    • The Java Series   🖋️ Data structures for Engineering     • Data Structures for Engineering   🖋️ English Grammer - Playlist 1    • ICSE/CBSE/State board -  English Grammar -...   🖋️ English Grammer - Playlist 2    • SSLC Karnataka English Grammar Important f...   🖋️ Essay writing - Season 1    • Essay Writing | ICSE CBSE | 30 Day Challen...   🖋️ Essay writing - Season 2    • Essay Writing | ICSE CBSE | 31 Day Challen...   🖋️Essay writing - Season 3    • Essay Writing - Season 3  |  31 Days chall...   Our another channel: My Day Lifestyle ✨    / @mydaylifestyle   #InitiateScientia #subscribe #foryou #java #javatutorial #arrays #theory #share #comment #byjpp #codinglife #coders