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Course Content

FAQs

An abstract class allows you to create functionality that subclasses can implement or override, whereas an interface allows you to state but not implement functionality. While a class can only extend one abstract class, it can implement several interfaces.

It's a technique for achieving complete abstraction. Because java does not permit multiple inheritances in the context of classes, multiple inheritances can be achieved by using an interface. It can also be used for loose coupling.

The following are some of the reasons why interfaces are useful: Detecting commonalities between unrelated classes without imposing a class hierarchy. Declaring methods that are intended to be implemented by one or more classes. displaying the programming interface of an object without revealing its class

The interface keyword is used to declare an interface. All methods in an interface are declared with an empty body, and all fields are public, static, and final by default. A class that implements an interface is required to implement all of the interface's functions.

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