Chapter 12. Object-Oriented, Functional Programming, and Lambda Expressions
In this chapter, we will discuss functional programming and how Java 9 implements many functional programming concepts. We will work with many examples on how to mix functional programming with object-oriented programming. We will:
- Understand functions and methods as first-class citizens
- Work with functional interfaces and lambda expressions
- Create a functional version of array filtering
- Create a data repository with generics and interfaces
- Filter collections with complex conditions
- Use a map operation to transform values
- Combine a map operation with reduce
- Chain many operations with map and reduce
- Work with different collectors
