Welcome to our exciting Java journey! Today's lesson focuses on Interfaces, Abstract Classes, and Simple Inheritance, which are essential to object-oriented programming. We'll unravel these concepts, understand their roles, and learn how to use them effectively. Our voyage will take us from interfaces to abstract classes, concluding with inheritance. Are you ready to boost your Java skills? Let's dive in!

Think of an Interface as a contract or a set of guidelines. A class can follow these guidelines or implement the interface. In this case, we have an interface, FootballPlayer, which represents the behaviors of a football player such as dribble(), pass(), and shoot().

To follow an Interface, a class needs to implement it. This action necessitates the definition of all its methods. So, we create a Forward class that promises to adhere to our FootballPlayer interface: