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. Welcome to the ninth video of the complete course of Java for beginners. This playlist is a Java tutorial for beginners: https://www.youtube.com/playlist?list=PLab_if3UBk9-ktSKtoVQoLngTFpj9PIed 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. Repository: https://github.com/serlesen/java-complete-course/tree/chapter_9 Solutions: https://github.com/serlesen/java-complete-course/tree/chapter_9_solutions My NEW eBook: https://sergiolema.dev/git-book/ My Spring Boot Academy: https://sergiolema.dev/the-spring-boot-academy/ Java Courses: https://coddy.tech/courses/beginner_challenges__practice_basic_concepts?ref=3quUPy Facebook: https://www.facebook.com/thedevworldsergiolema Twitter: https://twitter.com/thedevworld_sl Buy Me a Coffee: https://www.buymeacoffee.com/serlesen Sound from Zapsplat.com

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