Modern Syntax (17+)

Java has evolved significantly since Java 8. This module covers the most impactful syntax improvements introduced in recent LTS versions (Java 17 and 21), focusing on writing concise, expressive, and safe code.

Module Contents

1. Records & Sealed Classes

Eliminate boilerplate with Records (immutable data carriers) and strictly control inheritance hierarchies with Sealed Classes. Learn how to create Algebraic Data Types (ADTs).

2. Pattern Matching

Master the new instanceof syntax, pattern matching for switch, and record patterns for destructuring data. Write safer code with guarded patterns.

3. Switch Expressions

Transform your control flow. Learn the modern switch expression, arrow syntax (->), yield, and how the compiler ensures exhaustiveness.

Review & Cheat Sheet

Test your knowledge with interactive flashcards and a quick reference guide to all the new syntax.

Module Chapters