Fundamentals Of Object-Oriented Programming: Java and IntelliJ - Interfaces

The video tutorial explains the concept of interfaces in programming, highlighting their role as reference types that can contain constants, methods, and nested types. It demonstrates how interfaces, like abstract classes, cannot be instantiated but can be implemented by other classes. Using a UML model, the tutorial shows how a Person and a Dog class implement a Walkable interface, sharing common features like walking. The tutorial then guides through coding the Walkable interface in Intellij, implementing the walk method in both classes, and testing the implementation in a main program. It emphasizes the importance of using interfaces for efficient, reusable code.

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