What are the best practices in function overriding?

What are the best practices in function overriding?

Function overriding allows a subclass to provide a specific implementation of a method that is already defined in its superclass. Best practices include ensuring that the method signature matches, using the @Override annotation for clarity, and maintaining the Liskov Substitution Principle.

Can you explain the Liskov Substitution Principle?

Sure! The Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program. This means that the subclass should extend the behavior of the superclass without changing its expected behavior.

What are some common mistakes to avoid when overriding functions?

Common mistakes include changing the method's return type, not calling the superclass method when necessary, and failing to maintain the expected behavior of the overridden method.

How can I test overridden methods effectively?

You can test overridden methods by creating unit tests that verify both the behavior of the subclass and the superclass. Ensure that you check for expected outputs and any side effects.