Hi I am trying to make an item give the player poison when it is in the players inventory

 

Here's the code

 

package info.coremodding.realchemics.items;

import info.coremodding.realchemics.creativetabs.RCCreativeTabs;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.world.World;

public class ItemChemicalWaste extends Item{

public static ItemStack ChemicalWaste = new ItemStack(items.ChemicalWaste);
{
	/**
	 * Set's the Creative Tab of the Item
	 */
	this.setCreativeTab(RCCreativeTabs.tabRealChem);
	this.setUnlocalizedName("itemChemicalWaste");

}

public void isItemInInventory(ItemStack itemstack, EntityPlayer player, World world){

	if(player.inventory.hasItemStack(new ItemStack(items.ChemicalWaste))){
		player.addPotionEffect(new PotionEffect(Potion.poison.id, 200, 1, false));
	}

}

}

 

It would be appriciated if you could help me

isItemInInventory doesn't exist.

Try onUpdate(ItemStack, World, Entity,..)