Bad hierarchies, like ones with too many levels or irrelevant classes, make code difficult to understand and maintain. They can also cause problems with encapsulation and increase coupling. For instance, if a 'Product' class has subclasses like 'PerishableProduct' and 'LuxuryProduct', but both need methods unrelated to 'Product', it may indicate a design issue.
Additional Notes
Why is it important to avoid bad hierarchies?
Track: Java
Topic: Core Java
Focus: Code Reading with Related Types
Topics:Code Reading with Related TypesCore JavaJava