What are the best practices for using default methods in Java?

What are the best practices for using default methods in Java?

Default methods in Java allow you to add new methods to interfaces without breaking existing implementations. Best practices include using them sparingly, ensuring they are backward compatible, and avoiding complex logic.

Can you give an example of a good use case for default methods?

Sure! A good use case is when you want to provide a common behavior across multiple implementations of an interface, like a default logging method that can be overridden if needed.

Are there any drawbacks to using default methods?

Yes, potential drawbacks include increased complexity in the interface and the risk of method conflicts if multiple interfaces provide default methods with the same name.

How do default methods affect interface inheritance?

Default methods can lead to the diamond problem in multiple inheritance scenarios, where a class inherits from two interfaces with the same default method. In such cases, the class must explicitly override the method.

What should I avoid when using default methods?

Avoid using default methods for critical business logic, as they can make the interface harder to understand and maintain. Also, steer clear of using them in public APIs to prevent breaking changes.