gistfile1.txt

 public static void main(String[] args) throws InterruptedException, ExecutionException {
        List<Integer> list1 = List.of(1, 2, 3);
        List<Integer> list2 = List.of(4, 5, 6);
        List<Integer> list3 = List.of(7, 8, 9);

        CompletableFuture<Void> future1 = CompletableFuture.runAsync(() -> processList1(list1));
        CompletableFuture<Void> future2 = CompletableFuture.runAsync(() -> processList2(list2));
        CompletableFuture<Void> future3 = CompletableFuture.runAsync(() -> processList3(list3));

        // Wait for all futures to complete
        CompletableFuture.allOf(future1, future2, future3).join();

        System.out.println("All lists processed.");
    }