Functional Programming with Java

Learn how to write better, more organized code by leveraging core concepts of functional programming: immutability, data-function separation, and first-class functions.

Introduction

• Functional programming: A new way to organize code
• What you should know

1. Introduction to Functional Programming

• Why use functional programming?
• What is declarative programming?
• Immutability in functional programming
• Functional purity
• First-class functions

2. First-Class Functions

• The function interface
• Lambda expressions
• BiFunctions and beyond
• Functions as data
• Passing functions as arguments
• Returning functions
• Closure
• Higher-order functions

3. Working with Streams in Java

• Map in Java
• Filter in Java
• Reduce in Java
• Collect in Java
• Challenge: Stream exercises
• Solution: Stream exercises
• Combine list functions
• Parallel streams
• Challenge: Average salary calculator
• Solution: Average salary calculator

4. Advanced Concepts

• Advanced functional concepts
• Partial application and currying
• Recursion
• Composition
• Challenge: Recursion
• Solution: Recursion