Первый взгляд на обновленные Thread API и Executor Service API в рамках Project Loom:

Thread thread = Thread.startVirtualThread(() -> System.out.println("Hello"));
thread.join();

try (ExecutorService executor = Executors.newVirtualThreadExecutor()) {
   Callable<String> task1 = () -> "foo";
   Callable<String> task2 = () -> "bar";
   Callable<String> task3 = () -> "baz";
   String result = executor.invokeAny(List.of(task1, task2, task3));
}

https://wiki.openjdk.java.net/display/loom/Getting+started
https://wiki.openjdk.java.net/display/loom/Getting+started
https://wiki.openjdk.java.net/display/loom/Getting+started