![]() Everything in a method in an interface is considered abstract and public. The body of the interface method is provided by the 'implement' class. Since Java 8, you can also create default methods. To access the interface methods, the interface must be 'implemented' (kinda like inherited) by another class with the implements keyword (instead of extends ). Interface in Java is a bit like the Class, but with a significant difference: an interface can only have method signatures, fields and default methods. A class in Java can declare that it implements an. The interface keyword is used to declare a special type of class that only contains abstract methods. Executing a class as an interface by giving a code for every method declared through the interface. An interface defines a set of methods that a class must implement. Let’s take a look at the Runnable interface in the java. The Java interface is related to a class however, the interface body comprises just abstraction procedure and constants the final fields. What is an interface in Java?Simply put, an interface is a collection of methods with empty bodies. Sometimes I thought interfaces are not necessary and redundant.Over the time, by coding and reading a lot, I have been grasping a strong understanding about interfaces and realizing its importance and roles in designing good software programs.Therefore, I hope what I am going to share with you today about interfaces would help you save time on understanding this important concept in Java programming. Because the program is still able to run with or without interfaces, right?Did you think so in the beginning time you learn about interfaces in Java?I didn’t understand the benefits of using interfaces when I started learning Java. ![]() At first glance, many see that interfaces increase the amount of code and complexity of a program. The big difference between interfaces and classes is that an interface is solely a specification of the messages that an object responds to, without any methods. The interface in Java is a mechanism to achieve abstraction. It has static constants and abstract methods.
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