Could Someone Explain To Me How To Make A Monster Friendly Mod

I have just started to create plugins and mods and for my first plugin i want to create a combination of an invisibility mod and a mod that makes the monsters ignore you. Could someone get me started on the monster friendly part.

-Travis

 

just cancel the EntityTarget Event

 

thank you, can you tell me how to do that with a command, because when i try it just does nothing

 

Im on my phone right now, but I can later when I get back to a computer

 

tnx

 

Typed this out without an IDE so there might be little mistakes.

Code:

Set<Player> hidden = new HashMap<Player>();

@Override
public void onEntityTarget(EntityTargetEvent event) {
	if (event.isCancelled()) {
		return;
	}
	if (event.getEntity() instanceof Player) {
		Player p = (Player)event.getEntity();
		if (hidden.contains(p)) {
			event.setCanceled(true);
		}
	}
}