Java 21 Has Arrived! (#28)

Since 2018, we get a new version of Java every 6 months. And version 21, released this month, will be a long-term support version that can be used for many years. It also brings a lot of new features and improvements in both the language and the runtime. Actually, there are so many that we’ll probably not get all of them discussed in this podcast! Let’s see what our experts find the most important facts we need to know about Java 21. Guests Mohamed Taman https://twitter.com/_tamanm https://www.linkedin.com/in/mohamedtaman/ https://foojay.io/today/hidden-and-not-so-hidden-gems-in-java-20/ Piotr Przybyl https://mstdn.social/@piotrprz https://twitter.com/piotrprz https://www.linkedin.com/in/piotrprzybyl/ https://softwaregarden.dev/en/about-me/ Simon Ritter https://mastodon.social/@speakjava https://twitter.com/speakjava https://www.linkedin.com/in/siritter/ Podcast Host: Frank Delporte https://foojay.social/@frankdelporte https://twitter.com/FrankDelporte Content 00:00 Intro and introduction of the guests01:51 Excitement about the OpenJDK 21 release04:18 What is Long Term Support?https://twitter.com/nipafx/status/167690878531349299206:07 Every OpenJDK release is stable and production-readyhttps://www.linkedin.com/posts/mohamedtaman_aws-activity-7101961717521264640-F8jh11:44 Next LTS in two years12:06 Should you wait a bit before using 21?13:07 About JEPs, new versus incubator and previewhttps://openjdk.org/projects/jdk/21/17:13 JEP 444: Virtual Threadshttps://softwaregarden.dev/en/posts/new-java/loom/dont-look-at-virtual-threads/22:30 JEP 430: String Templateshttps://blogs.oracle.com/javamagazine/post/java-21-sneak-peek26:05 JEP 440: Record Patterns + JEP 441 Pattern Matching for switch27:11 JEP 442: Foreign Function & Memory API (Third Preview)29:05 Energy efficiency of Javahttps://thenewstack.io/which-programming-languages-use-the-least-electricity/30:55 How Java evolves by inspiration of other languages33:56 Difference between OpenJDK projects and JEPs35:06 JEP 445: Unnamed Classes and Instance Main Methods (Preview)40:55 Dummies book “OpenJDK Migration”https://foojay.io/today/book-announcement-openjdk-migration-guide-for-dummies/42:28 What will Java 22 bring?43:27 JEP 443: Unnamed Patterns and Variables (Preview)45:18 JEP 439: Generational ZGChttps://foojay.io/today/what-should-i-know-about-garbage-collection-as-a-java-developer/49:33 Performance improvements by using newer runtimes51:23 JEP 451: Prepare to Disallow the Dynamic Loading of Agents52:37 Looking back at the 6-month release cycle introduction55:00 Outro