How can I create firebase user account

Question

I'm successfully created user with email from android without any problem but after I downloaded the standard java library and tried to make user I get no error or feedback for error or success in callback

public static void main(String ...args){
    String url= "https://example.firebaseio.com/";
    Firebase fb = new Firebase(url);
    fb.createUser("example@gmail.com", "123456", new Firebase.ResultHandler() {
        @Override
        public void onSuccess() {
            System.out.println("success");
        }
        @Override
        public void onError(FirebaseError firebaseError) {
            System.out.println("failed !");
        }
    });
    System.out.println("Hello there");
}

Answer 1

as above comments , the problem is the main thread is exit before ResultHnadler get called so i fixed the problem in this way to prevent the main thread terminate before the ResultHnadler get called its nice if there is better way

 public static void main(String ...args)  {
    final AtomicBoolean isCalled = new AtomicBoolean(false);
    String FIREBASE = "https://example.firebaseio.com/";
    Firebase fb = new Firebase(FIREBASE);
    fb.createUser("testtesttest@gmail.com", "1234321", new Firebase.ResultHandler() {
        @Override
        public void onSuccess() {
            isCalled.set(true);
            System.out.println("success");
        }
        @Override
        public void onError(FirebaseError firebaseError) {

            isCalled.set(true);
            System.out.println("fail");
        }
    });
    while (!isCalled.get()){
    }
}

Answer 2

If u are using an emulator to run your code just wait for 20-30 minutes,Because nowadays takes that much time,else you can use a device:it is much faster