Understanding and Applying the Law of Demeter in Java

The Law of Demeter (LoD), or the principle of least knowledge, is a software engineering design guideline that was formulated at Northeastern University towards the end of the 1980s. It primarily serves to promote loose coupling among software modules, thereby enhancing the maintainability and understandability of a software system. The central tenet of the Law of Demeter is straightforward - an object should limit its interactions to a close circle…

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Mastering the Decorator Design Pattern in Java

A Deep Dive into the Decorator Pattern and Its Benefits for Object-Oriented Design Introduction In Java, a decorator is a design pattern that allows you to add new functionality to an existing class without modifying its source code. The decorator pattern is a structural pattern, which means it deals with the composition of objects and their relationships. The decorator pattern works by creating a wrapper around an existing object, called…

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Chain of Responsibility Design Pattern in Java

A Real-World Example of Loan Approval Process Introduction Chain of Responsibility is a behavioural design pattern that allows you to pass requests along a chain of handlers, each handling the request if possible or forwarding it to the next handler in the chain if not. The Chain of Responsibility pattern is designed to decouple the sender and receiver of a request by providing multiple potential receivers, each with its own…

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