React flux demo doOnNext and count

ReactDemo.java

public class ReactDemo {

  public static void main(String[] args) {
		Flux.range(1,0)
				.doOnNext(System.out::println)
				.count().doOnNext(size -> {
					if (size == 0) {
						System.out.println("Size is: " + size);
					}
				}).subscribe();
	}
}