Working Class Java 4-3: How To Use Java Interfaces By Example, Beginner Tutorial 

This lesson covers how to use Java interfaces, and some basic terminology and understand of their usage. Since Ryan hates jargon and needlessly complex explanations, Ryan demonstrates some simple and practical ways to use interfaces.
You will likely want to watch lesson 4- first to learn about what abstractions are in general:
• Working Class Java 4-1...
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