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Java 20

Java 20 (2023):

  1. Scoped Values (incubator): A way to share data within and across threads without using ThreadLocal.
static final ScopedValue<String> USER = ScopedValue.newInstance();

void doWork() {
    ScopedValue.where(USER, "Alice").run(() -> {
        System.out.println("User: " + USER.get());
    });
}

  1. Virtual Threads (preview): Continued refinement of the feature introduced in Java 19.

  2. Pattern Matching for switch (preview): Further refinement and enhancements.