Interfaces and Abstract Classes in Java | Complete Java Course for Beginners #9

In this video, I will show how the interfaces in Java answer the polymorphism pattern. I will also show how the abstract classes answer the encapsulation and inheritance patterns.

Content of the video:
* what's an interface in Java;
* how an interface in Java answers to the polymorphism pattern;
* how to create a class which implements an interface;
* what's an abstract class in Java;
* how the abstract classes answer to the encapsulation and inheritance patterns;
* how to create a class which extends an abstract class;
* what are the differences between an interface and an abstract class;
* what are the default methods in an interface;
* what's the difference between this and super.