Solved Why can i not call arg[0] here

Hiii spigot why can i not call arg[] here again

Code (Java):

package Commands;

import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.entity.ArmorStand;
import org.bukkit.event.EventHandler;
import org.bukkit.inventory.ItemStack;
import org.inventivetalent.nicknamer.api.event.disguise.SkinDisguiseEvent;

public class nametagcmd implements CommandExecutor {

    @Override
    public  boolean onCommand(CommandSender sender, Command command, String label, String[] args){
        if(sender instanceof Player){

            Player player = (Player) sender;

            player.setPlayerListName(args[0]);
            player.setDisplayName(args[0]);
           

        }
       


        return true;
    }
    //Its here i cant .-.
    @EventHandler
    public void on(SkinDisguiseEvent event) {
        event.setSkin(args[0]);
    }

 

But how can i call the arg from the first #on()

 

But how so?