piskel | A simple web-based tool for Spriting and Pixel art | Canvas library

I made an ImageView in JavaFX and load a pixel art into it. And I scaled up, but I can't clearly see the pixels of the art. The problem should be the anti-aliasing. So I need to see clearly the pixels like on the second link. How can I turn anti-aliasing off?

I tried with img1.setSmooth(false);

What I made in JavaFX:

How it supposed to look like: //preview made in piskel

Here's my code:

So, i've been trying to make a videogame on unity, and i made my first sprite on piskel. Exported it as PNG but can't seem to make it work on Unity. I imported it as a new sprite and even selected sprite (2D and user UI) on the menu.I selected 2D sprite but it doesn't work. It's just like if I put an image there, and not a sprite.It stays still I even tried using another sprite format More rows

I can't find anyone else with the same problem out there on the internet, so help would be much appreciated. Thank you.