Understanding Interfaces in Java: A Beginner’s Guide
In Java, interfaces are a crucial part of object-oriented programming (OOP). They provide a way to achieve abstraction and multiple inheritance . If you are new to Java, understanding interfaces can open up new possibilities for designing flexible, scalable applications. In this blog, we will explore what an interface is, why it's useful, and how to implement it effectively in Java. What is an Interface in Java? An interface in Java is a blueprint of a class. It has static constants and abstract methods. The interface in Java is a mechanism to achieve abstraction . There can be only abstract methods in the Java interface, not method body. It is used to achieve abstraction and multiple inheritance in Java . In other words, you can say that interfaces can have abstract methods and variables. It cannot have a method body. With Java 8, interfaces gained the ability to have default methods and static methods in an interface. With Java ...