Functional Programming in Java

Recap

Collections are commonplace in programming and, thanks to lambda expressions, using them is now much easier and simpler in Java. We can trade the longwinded old methods for elegant, concise code to perform the common operations on collections. Internal iterators make it convenient to traverse collections, transform collections without enduring mutability, and select elements from collections without much effort. Using these functions means less code to write. That can lead to more maintainable code, more code that does useful domain- or application-related logic, and less code to handle the basics of coding.

In the next chapter we’ll cover how lambda expressions simplify another fundamental programming task: working with strings and comparing ...