They are not allowed inside classes, even if it is implemented class of that Interface. We’ll also try to understand the applicable use cases and challenges using default methods in interfaces. We can have Default methods (method with default keyword) only inside Interfaces as of Java 8. Default methods allow an interface to define an implementation for a method so that when a class implements the interface it does not need to provide its own.
JAVA INTERFACE DEFAULT METHOD HOW TO
In this article, we’ll discuss in depth about how to use default methods in interfaces. This way developers have flexibility to not implement the default methods in their implementation because these methods will already have already been defied by default. Methods which are defined inside the interface and tagged with default are known as default methods.
Default methods (also known as defender methods or virtual extension methods) assist developers in adding new methods with a default implementation to the interface without worrying about breaking any existing implementation. The most important use of default methods in interfaces is to provide additional functionality to a given type without breaking down the implementing classes. Java 8 introduced many new features, for example static and default method in interface along with lambda expressions, Functional Interfaces, Stream etc.
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