Java After Seventeen

source code

Want to play around with the code yourself? Check out the repository Java After Eight, a real-life code base, initially on Java 8, that invites an update to Java 15 and to the many new language features, additional and improved APIs, and JVM capabilities - it contains many of the snippets shown in this talk. It has a permissive license, so you can reuse the code for your projects.

table of contents

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Most projects that updated stick to the long-term support versions 11 or 17. The new cadence created the illusion of not much happening in between and after that, but nothing could be further from the truth - with new features like pattern matching, virtual threads, and structured concurrency, Java is moving faster than ever.

In this talk, we'll take a simple Java 17 code base, update it to 21, and refactor it to use the new Java capabilities.

▚Slides

Here's the current version of the slides.

I also embedded them below. If they're focussed, you can navigate with arrow keys or swipes (they're two-dimensional, with chapters on the horizontal axis and chapter content layed out vertically). Use Page Up/Down for linearized order and ? for more shortcuts.