Functional Programming in Java

List of Listings

Chapter 1. What is functional programming?

Listing 1.1. A Java program with side effects

Listing 1.2. The Payment class

Listing 1.3. The Tuple class

Listing 1.4. Composing multiple payments into a single one

Listing 1.5. Buying multiple donuts at once

Listing 1.6. Grouping payments by credit card

Chapter 2. Using functions in Java

Listing 2.1. Functional methods

Listing 2.2. functional programminginterfacesinterfacesas functionsJavafunctional interfacesJavaJavaThe complete Function interface

Listing 2.3. A one-liner lambda-based method converted to previous Java versions

Chapter 3. Making Java more functional

Listing 3.1. Simple email validation

Listing 3.2. Using a function to validate the email

Listing 3.3. A component ...