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Java2026-06-02

Java 21 Features

Java 21 features useful for modern backend engineering.

Java 21

Java 21 is a long-term support release with powerful concurrency improvements.

Important Features

  • Virtual threads
  • Pattern matching for switch
  • Sequenced collections
  • Record patterns

Virtual Thread Example

Thread.startVirtualThread(() -> {
    System.out.println("Running lightweight task");
});