supplyAsync.java

private static void demoSupplyAsync() throws InterruptedException, ExecutionException {
        CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync(() -> {
            System.out.println("Task Running inside completable Future");
            return "I am the returned result";
        });

        String result = completableFuture.get();
        System.out.println(result);
    }