Functional Programming in Java, 2nd Edition

Essential Practices to Succeed with the Functional Style

The functional features in Java don’t just change the syntax we type. To benefit fully from these features and create highly concise and lightweight applications, we need to change the designs, the code, and our thinking; it’s different from the imperative and object-oriented paradigm we’re used to in Java. Let’s go over some of the fundamental ways we have to change how we develop applications and the benefits we’ll receive in return.

More Declarative, Less Imperative

We have to raise the level of abstraction. Rather than imperatively focusing on the steps to take, we have to think and express declaratively the bigger goals we want to achieve. For example, instead of commanding the computer ...