What are some common mistakes in inheritance and polymorphism?

What are some common mistakes in inheritance and polymorphism?

Some common mistakes include misunderstanding the 'is-a' relationship, improper overriding of methods, and failing to call the superclass constructor.

Can you explain the 'is-a' relationship?

The 'is-a' relationship defines how a subclass inherits from a superclass. For example, a 'Dog' is a 'Animal', but a 'Car' is not an 'Vehicle'.

What happens if I don't call the superclass constructor?

If you don't call the superclass constructor, the superclass's initialization code won't run, which can lead to uninitialized fields and unexpected behavior.

How can I avoid these mistakes?

To avoid these mistakes, always ensure proper understanding of class hierarchies, use clear naming conventions, and thoroughly test your code.