Cooldown in Kit System

Hello, im developing now a Kit-system for my Skypvp server, but i my Cooldown dont work, can anyone please help me. Thanks!

 

Code:

package me.kodpvp.kit;

import java.util.HashMap;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;

import me.kodpvp.main.Main;

public class kits implements Listener{
    public HashMap<String, Long> cooldowns = new HashMap<String, Long>();
    @EventHandler
    public void onClickInventory(InventoryClickEvent e){
        Player p = (Player) e.getWhoClicked();
        e.setCancelled(true);
        if(e.getCurrentItem().getItemMeta().getDisplayName().equals("§dKit Hero")){
            if(p.hasPermission("skypvp.hero")){               
                if(cooldowns.containsKey(p.getName())){ 
                    long secondsLeft = ((cooldowns.get(p.getName()) / 1000) + 2000)- (System.currentTimeMillis() / 1000); 
                    p.sendMessage(Main.prefix+"Du musst noch "+  secondsLeft + " §7sekunden warten, bis du dir das §aKit §7nochmal abholen kannst.");
                    if(secondsLeft > 0) {
                       
                        return;
                    }
                }
                cooldowns.put(p.getName(), System.currentTimeMillis());
                //p.playSound(p.getLocation(), Sound.CHEST_OPEN, 1, 1);
                //p.openInventory(Main.kits);
            }
        }

       
    }

}

 

Have you tried to debug your code? Print out the variables and stages to see where the code is getting to.
Also, you are cancelling the inventory click straight away, which could break all inventory interactions essentially.

 

But when i not cancelling the inventory click event, i can move the items in the inventory

Im only want, when i click on the Item the player become his items and can not do it again before the time is end

Thanks timtower i try it

EDIT by Moderator: merged posts, please use the edit button instead of double posting.