Advent of Code 2022 – Object-Oriented Solutions in Java

Most solutions to Advent of Code found on the Internet consist of procedural spaghetti code that is not very readable, let alone maintainable.

I therefore took the trouble to implement each task in a truly object-oriented and test-driven way, resulting in a solution made of small, comprehensible objects interacting with each other.

For explanations of my solutions, see my Advent of Code 2022 Solutions article.

This project uses Java 19 features such as record patterns and pattern matching for switch. They were preview features in Java 19 and are final since Java 21, so the project is compiled with Java 21 and no longer needs the --enable-preview flag.

Stay up-to-date with the latest Java features with this free PDF Cheat Sheet!

• Avoid lengthy research with this concise overview of all Java versions from Java 10 to Java 26.
• Discover the innovative features of each new Java version, summarized on a single page.
• Impress your team with your up-to-date knowledge of the latest Java version.

👉 Download the free Java Versions PDF

(Hier geht's zur deutschen Version → Java-Versionen PDF)

With this free 1-page PDF cheat sheet, you'll always have the 7 most important complexity classes at a glance.

• Always choose the most efficient data structures and thus increase the performance of your applications.
• Be prepared for technical interviews and confidently present your algorithm knowledge.
• Become a sought-after problem solver and be known for systematically tackling complex problems.

👉 Download the free Big O Cheat Sheet

(Hier geht's zur deutschen Version → O-Notation Cheat Sheet)

👉 Want to stay on top of modern Java? Sign up for the HappyCoders newsletter – Modern Java: new versions & features, performance, and JVM insights – once a month.

(Hier geht's zur deutschen Version → HappyCoders-Newsletter deutsch)

Trage dich jetzt unverbindlich auf die Warteliste von „Mastering Data Structures in Java“ ein, und erhalte das beste Angebot!

👉 Zur Warteliste