Hey there, I was wondering what I am doing wrong. I have tried both:

public void onArmorTick(World world, EntityPlayer player, ItemStack itemStack) {
	if(player.getCurrentArmor(3) != null && player.getCurrentArmor(2) != null && player.getCurrentArmor(1) != null){
		ItemStack helmet = player.getCurrentArmor(3);
		ItemStack plate = player.getCurrentArmor(2);
		ItemStack legs = player.getCurrentArmor(1);
		if(helmet.getItem() == itemRegist.bedrockHelmet && plate.getItem() == itemRegist.bedrockChest && legs.getItem() == itemRegist.bedrockLegs){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 2));
			player.addPotionEffect(new PotionEffect(Potion.resistance.getId(), 5, 1));
		}
		else if(helmet.getItem() == itemRegist.bedrockHelmet && plate.getItem() == itemRegist.bedrockChest){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 1));
			player.addPotionEffect(new PotionEffect(Potion.resistance.getId(), 5, 0));
		}
		else if(helmet.getItem() == itemRegist.bedrockHelmet){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 0));
		}

	}

and:

public void onArmorTick(World world, EntityPlayer player, ItemStack itemStack) {
	if(player.getCurrentArmor(3) != null && player.getCurrentArmor(2) != null && player.getCurrentArmor(1) != null){
		ItemStack helmet = player.getCurrentArmor(3);
		ItemStack plate = player.getCurrentArmor(2);
		ItemStack legs = player.getCurrentArmor(1);
		if(helmet.getItem() == itemRegist.bedrockHelmet){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 0));
		}
		else if(helmet.getItem() == itemRegist.bedrockHelmet && plate.getItem() == itemRegist.bedrockChest){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 1));
			player.addPotionEffect(new PotionEffect(Potion.resistance.getId(), 5, 0));
		}

		else if(helmet.getItem() == itemRegist.bedrockHelmet && plate.getItem() == itemRegist.bedrockChest && legs.getItem() == itemRegist.bedrockLegs){
			player.addPotionEffect(new PotionEffect(Potion.moveSlowdown.getId(), 5, 2));
			player.addPotionEffect(new PotionEffect(Potion.resistance.getId(), 5, 1));
		}

	}


}

And neither do what I am looking for.

I want it so when a player is wearing one piece of armour (that isn't boots) they get slowness one (and yes, I left out the ors for when there are less 2 or 1 items being worn, I just wanted to test), when they wear 2 they get slowness 2 and resistance 1, and when they wear all 3 they gets slowness 3 resistance 2.

With the first code it only works on the helmet being worn - giving slowness 1

With the second code it only works when everything is worn - giving slowness 3, resistance 2.

 

 

I never really messed with customizing armour and potion effects, any pointers on how to achieve this goal?

Please learn basic Java. && is and, || is or.

I know that. As I said, when they are wearing more stuff they get more effects... which is in the code that I posted...

Pardon my ignorance, I just realized where I have been going wrong. Sorry about that.