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

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

Default methods in interfaces allow you to add new functionality without breaking existing implementations. Best practices include: 1. Use them sparingly to avoid confusion. 2. Ensure they are well-documented. 3. Avoid complex logic in default methods.

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

Sure! A good use case is when you want to add a new method to an existing interface, like a Printable interface. You can provide a default implementation for print() that prints a standard message, allowing older classes to remain functional.

What should I avoid when implementing default methods?

Avoid using default methods for critical business logic, as it can lead to unexpected behavior. Also, refrain from overriding default methods in subclasses unless necessary, as it can create confusion.

How do default methods affect interface evolution?

Default methods facilitate interface evolution by allowing you to add new methods without forcing all implementing classes to update. This helps maintain backward compatibility.