Java Generics, Collections Framework And Streams API

About Java Generics, Collections Framework And Streams API

Learn about Java Generics and how to create Generic classes. You also learn about Generic Interfaces and Methods. After learning and understanding

Java Generics

we then dive into the

Java Collections Framework

where we learn about data structures such as

List

,

ArrayList

,

HashMap

,

HashSet

,

LinkedList

... and so on. Generics are an

important part

of the Java programming language. We have extra lessons on

Java Optional

which helps us avoid null pointer exceptions in Java. You will learn about Optionals because it's knowledge will be applied when you learn about Java Streams API. Finally, we learn about the

Streams API

, how it works and the various methods such as

filter()

,

map()

,

flatMap()

,

reduce()

,

collect()

... and so on. After this course, you should have a solid understanding of the Java Generics, the Collection Framework with its Data Structures and the Java Streams API. In a nutshell, generics enable _types_ (classes and interfaces) to be parameters when defining classes, interfaces and methods. Much like the more familiar _formal parameters_ used in method declarations, type parameters provide a way for you to re-use the same code with different inputs. The difference is that the inputs to formal parameters are values, while the inputs to type parameters are types. (

_Java Docs_

)