Save config enderchest?

Here my code:

Code:

package me.summc.Backpack;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;
 
public class Main extends JavaPlugin implements Listener{
   
    public void onEnable(){
        getServer().getPluginManager().registerEvents(this, this);
    }
   
    @EventHandler
    public void onInventoryClick(PlayerInteractEvent e){
        Player p = e.getPlayer();
        Inventory newcomer = Bukkit.createInventory(null, 18, ChatColor.BLACK + "Backpack");
        Inventory skyman = Bukkit.createInventory(null, 27, ChatColor.BLACK + "Backpack");
        Inventory skyguide = Bukkit.createInventory(null, 36, ChatColor.BLACK + "Backpack");
        ItemStack air = new ItemStack(Material.AIR);
        ItemMeta airMeta = air.getItemMeta();
        air.setItemMeta(airMeta);
        if (p.hasPermission("bp.normal")){
            if ((e.getAction() == Action.LEFT_CLICK_AIR)) {
                if (p.getItemInHand().getType() == Material.ENDER_CHEST){
                    newcomer.setItem(1, air);
                    p.openInventory(newcomer);
                }
            }
        }
        if (p.hasPermission("bp.medium")){
            if ((e.getAction() == Action.LEFT_CLICK_AIR)) {
                if (p.getItemInHand().getType() == Material.ENDER_CHEST){
                    skyman.setItem(1, air);
                    p.openInventory(skyman);
                }
            }
        }
        if (p.hasPermission("bp.hard")){
            if ((e.getAction() == Action.LEFT_CLICK_AIR)) {
                if (p.getItemInHand().getType() == Material.ENDER_CHEST){
                    skyguide.setItem(1, air);
                    p.openInventory(skyguide);
                }
            }
        }
    }
   
    public void onDisable(){
       
    }
}

When i put item in there then close and open again, the item is gone? Please help me

 

Moved to Plugin Developement.

 

OFFTOPIC? When did u got Moderator ALso GG

ONTOPIC: Do you save the items in a config file?

 

JordyPwner
Please keep this Thread clean. You can talk about things like that on my Profile. And I am mod since 3 days now.

sum_17427
You probably want to store the Player's UUID in an ArrayList when they open the Inventory.
And when they close it, loop through all the Items in the Inventory and store them in a config along with their slot.
Now when you open the Inventory, instead of setting an Air Block into the first Inventory slot, loop through the size of the Inventory and retrieve the ItemStack from the config using the current slot.

 

mrCookieSlime
What should i do? Can i have a full code, also im remove the Air Block

 

sum_17427
I am not going to spoonfeed you.
I told you what to do, you can just google how to do it.