Who is this Cheat Sheet for?

This Cheat Sheet is perfect for you if...

… you want to upgrade:
but don't yet have an overview of what has changed since your last Java version.

… you want to look things up quickly:
which Java version introduced a specific feature.

you want to convince your team:
with a compact overview of all the important Java updates.

Why learn with me?

I've been working with Java for over 20 years as a developer, CTO, trainer, author, and speaker – and have helped companies modernize complex Java systems and develop their teams sustainably.
With HappyCoders.eu, I've built one of the most widely read Java blogs in the German-speaking world and regularly speak at conferences and user groups.

⭐⭐⭐⭐⭐
Rated 4.97 out of 5 on ProvenExpert

More about me

Java versions included in the Cheat Sheet

The PDF covers the most important updates of all Java versions from Java 10 to Java 26.
The table shows which versions are covered in the Cheat Sheet – LTS versions are highlighted.

Java 26
Current
March 17, 2026
September 16, 2025
March 18, 2025
September 17, 2024
March 19, 2024
September 19, 2023
March 21, 2023
September 20, 2022
March 22, 2022
September 14, 2021
March 16, 2021
September 16, 2020
March 17, 2020
September 17, 2019
March 19, 2019
September 25, 2018
March 20, 2018


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Want to go deeper?

My blog covers a wide range of Java, software architecture, and performance topics – from foundational concepts to advanced patterns.
If you want to dive deeper, take a look at my trainings: hands-on, easy to follow, and directly applicable to your day-to-day project work. Instead of pure theory, I focus on principles that help you write code that's better, more maintainable, and more performant in the long run.
Go to Java Trainings