Since the Java platform adopted a six-month release cycle, we’ve moved past the perennial questions such as “Will Java die this year?” or “Is it worth migrating to the new version?”. Despite 28 years since its first release, Java continues to thrive and remains a popular choice as the primary programming language for many new projects.

Java 17 was a significant milestone, but Java 21 has now taken 17’s place as the next long-term support release (LTS). It’s essential for Java developers to stay informed about the changes and new features this version brings. Inspired by my colleague Darek, who detailed Java 17 features in his article, I’ve decided to discuss JDK 21 in a similar fashion (I’ve also analyzed Java 23 features in a follow-up piece, so check it out too).

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