Generics is a programming style where classes, functions, data structures, or algorithms are written in such a way that the exact type can be specified later. In general, generics provide type safety together with the ability to reuse a particular code structure for various data types.
Generics are present in both Java and Kotlin. They work in a similar way, but Kotlin offers a few improvements over the Java generic type system, such as use-site variance, start-projection syntax, and reified type parameters. We will discuss them in this chapter.
