Java 21 Pattern Matching Tutorial

Java 21 is the first Java release with all essential pattern matching features finalized: sealed types and type patterns in an improved switch; also final (and very helpful) are records and record patterns. We'll explore how these language features come together to allow pattern matching, what that means for Java developers, and how we can push these features further to implement a new (to Java) programming paradigm: data-oriented programming.

#RoadTo21 playlist:    • Road to 21  

~~~ Chapters ~~~
0:00 Intro
1:31 Language Features
extended instanceof: https://openjdk.org/jeps/394
switch expression: https://openjdk.org/jeps/361
patterns in switch: https://openjdk.org/jeps/441
sealed types: https://openjdk.org/jeps/409 &    • Sealed Classes - JEP Café #2  
9:09 Pattern Matching
13:41 Data-oriented Programming
records: https://openjdk.org/jeps/395
record patterns: https://openjdk.org/jeps/440
data-oriented programming: https://www.infoq.com/articles/data-o... &    • Data-Oriented Programming - Inside Ja...  
unnamed patterns: https://openjdk.org/jeps/443
22:19 Outro

Tags: #Java #Java21 #Design #CleanCode #OpenJDK