7/21/2023 0 Comments Java interface default method![]() ![]() In an interface, all methods are implicitly public, and the visibility cannot be changed. Members of an abstract class can have access modifiers, such as public, private, and protected, to control their visibility and accessibility. However, starting with Java 8, an interface can have default methods with a default implementation.Īn abstract class can have constructors, while an interface cannot have any constructors. Here are some key differences between them:Īn abstract class can be a base class for inheritance and provide a common implementation for its subclasses, while an interface only defines a contract for its implementing classes and does not provide any implementation.Īn interface can be implemented by multiple classes, providing multiple inheritance, which is not possible with an abstract class.Īn abstract class can have abstract and concrete methods, while an interface can only have abstract methods (methods without a body). In Java 8, the interface may have default methods along with the abstract method which creates a question, what is the difference between interface and abstract class? As the interface now can contain non-abstract methods as well as abstract classes.Īn abstract class and a Java 8 interface in Java serve different purposes and have different characteristics. This way, default methods provide a way to add new functionality to an interface without breaking existing code and allow implementing classes to choose whether to use the default implementation or provide their own. ![]()
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