Oberservable_Just

Observable.just("a","b","c","d","e","f","g","h","i","j")
                .subscribe(new Observer<String>() {
                    @Override
                    public void onSubscribe(Disposable disposable) {
                         log.info("onSubscribe");
                    }
                    @Override
                    public void onNext(String s) {
                        log.info("onNext -> {}",s);
                    }
                    @Override
                    public void onError(Throwable throwable) {
                        log.info("onError {}",throwable.getMessage());
                    }
                    @Override
                    public void onComplete() {
                        log.info("onComplete");
                    }
                });