I’ve created a Java application that contrasts the imperative, object-oriented and declarative, functional programming approaches to writing code. Study the code below and then I’ll point out ...

Java is an ‘object oriented’ programming language. That means that it’s built from many objects that interact with each other, rather than being a long list of instructions.

In Part 2 we’ll revisit those techniques using Java code that pre-dates Java 8. As you’ll see, this code is functional, but it’s not easy to write or read.