TimeInterval.java

Observable.interval(100, TimeUnit.MILLISECONDS)
                .take(3)
                .timeInterval()
                .subscribe(new Subject<Timed<Long>>() {
                    @Override
                    public boolean hasObservers() {
                        return false;
                    }

                    @Override
                    public boolean hasThrowable() {
                        return false;
                    }

                    @Override
                    public boolean hasComplete() {
                        return false;
                    }

                    @Override
                    public Throwable getThrowable() {
                        return null;
                    }

                    @Override
                    protected void subscribeActual(Observer<? super Timed<Long>> observer) {

                    }

                    @Override
                    public void onSubscribe(Disposable d) {

                    }

                    @Override
                    public void onNext(Timed<Long> longTimed) {
                        System.out.println("onNext: " + longTimed);
                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onComplete() {

                    }
                });

        Thread.sleep(3000);