Effective Interface with ISP
Explore how to apply the Interface Segregation Principle to design small, cohesive interfaces in Java. This lesson helps you understand keeping interfaces focused on a single responsibility and how breaking down large interfaces improves code maintainability and clarity using TDD and SOLID principles.
We'll cover the following...
Keeping interfaces effective and focused
In this lesson, we’ll look at a principle that helps us write effective interfaces, known as ISP (Interface Segregation Principle). It advises us to keep our interfaces small and dedicated to achieving a single responsibility. By small interfaces, we mean having as few methods as possible on any single interface. These methods should all relate to some common theme. We can see that this principle is really just SRP in another form. We’re saying that an effective interface should describe a single responsibility. It should cover one abstraction, not several. The methods on the interface should strongly relate to each ...