class Ambiguous{

​

    public static void main(String[] args) throws InterruptedException {

        Observable<String> ob1 = Observable.interval(1, TimeUnit.SECONDS).take(10)

                                .map(e -> "Ob 1 :"+e);

        Observable<String> ob2 = Observable.interval(10, TimeUnit.MILLISECONDS).take(10)

                                .map(e -> "Ob 2 :"+e);

        Observable.amb(Arrays.asList(ob1,ob2))

        .subscribe(System.out::println);

        Thread.sleep(11000);

    }

​

}

​