Sealed classes instead rely on a set of sub-classes, allowing us to have multiple instances of each sub-class and for them to have their own state. An enum consists of a set of constant values and the instance is assigned one of these constants. □ Sealed classes, like a letter seal, only totally different Howīoth enums and sealed classes allow us to represent a type that can be one value from a set of possibilities. Let’s have a look at how sealed classes can be used, their benefits and some example situations in which they can be the perfect tool for the job. ![]() They are a really useful addition to the language, enabling powerful use cases and can help us build some really nice APIs. ![]() Kotlin takes this concept and evolves into something much more powerful, known as sealed classes. Wouldn’t it be great if you could represent a single type that can come in different forms, each able to be constant or carry their own data? If programming in Kotlin, we are in luck as that is exactly what a sealed class is perfect for!Įnums or enumerated types have existed in many different programming languages for years and allows us to represent a type whose value is taken from a limited set of values.
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