How would I stop my game loop from running at thousands of FPS?

Newbie & Debugging Questions
#1

Hey,

For the past few months I’ve been messing around on a little project of mine and now I’m just getting to the point where I can start using the game loop again. I haven’t even looked at this loop in a few months so I’m not sure how to fix it up the way I want just yet. Could someone explain how I could go about limiting the FPS to stop it from running at a few thousand FPS?

public void run() {
		long lastTime = System.nanoTime();
		long timer = System.currentTimeMillis();
		final double NANO_SECONDS = 1000000000.0 / 60.0;
		double delta = 0.0;
		int frames = 0; // (FPS)Counts how many frames can be rendered per second.
		int updates = 0; // Counts how many times update(); can be called per second.
		
		new TESTING();

		while (running) {
			long now = System.nanoTime();
			delta += (now - lastTime) / NANO_SECONDS;
			lastTime = now;
			while(delta >= 1)
			{
				updateLogic();
				updates++;
				delta--;
			}
			renderScreen();
			frames++;
			
			if((System.currentTimeMillis() - timer) > 1000)
			{
				timer += 1000;
				FRAME.setTitle(updates + "UPS, " + frames + "FPS");
				updates = 0;
				frames = 0;
			}
		}
		stop();
	}

I’m fairly sure that I based this game loop off of TheCherno’s youtube tutorials but it was quite a while back so I’m not sure.

Thanks in advance for any replies.