They allow you to access and mutate the components of your objects. Note that getter and setter methods are often considered an anti-pattern and a signal of poor object-oriented design.Ġ2:16 The main argument behind this proposition is that these methods break encapsulation. Instead, you should provide getter and setter methods, also known as accessors and mutators, respectively.Ġ2:01 These methods offer a way to change the internal implementation of your attributes without changing your public API. radius.Ġ1:46 Programming languages such as Java and C++ encourage you to never expose your attributes to avoid this kind of problem. You need to manage this situation in a way other than removing. diameter would break the code of some of your end users. They don’t want Circle to store the radius any longer.Ġ1:30 They need a public. Now suppose that you have an important user that comes to you with a new requirement.

You finish coding the class and make it available to your end users.Ġ1:17 They start using Circle in their code to create projects and applications. The initial implementation has a single attribute called. The problem comes when you need to change the internal implementation of a given attribute.Ġ1:05 Let’s say you’re working on a Circle class. If you expose your attributes to the user, then they become part of the public API of your classes.Ġ0:53 Your user will access and mutate them directly in their code. Methods are functions attached to a given class.Ġ0:39 They provide the behaviors and actions that an object can perform with its internal data and attributes. Either you can access and mutate the attribute directly, or you can use methods. Attributes represent or hold the internal state of a given object, which you’ll often need to access and mutate.Ġ0:28 Typically, you have at least two ways to manage an attribute. In other words, you’ll end up with variables that are accessible through the instance, class, or even both, depending on the language.

When you define a class in an object-oriented programming language, you’ll probably end up with some instance and class attributes. 00:00 Managing Attributes in Your Classes.

Kotlin internal class meaning