How to keep a player from picking up items in their inventory

I'm making a battle arena plugin and I don't want players to be able to edit their inventory AT ALL in any way. I've tried different people's ideas but there were glitches involved. How do I make it so that when a player picks up an item from their inventory... that item in their hand gets removed from their hand and placed back into the inventory.

e.g.
-Player clicks an item in his inventory-
-item now follows player's cursor BUT-
- the item then gets taken from the cursor and gets put back into the inventory slot from where it was removed, thus, preventing the player from editing anything because every time the player clicks an item it gets immediately put back-

How do I achieve this?

 

tylersyme
This stops the player from dropping an Eye of ender.
to make it so they cant drop anything just use event.setcancelled(true); in the event

Code:

@EventHandler
public void onPlayerDropItem(PlayerDropItemEvent event) {
 
if (event.getItemDrop().getItemStack().getType() == Material.EYE_OF_ENDER) {
event.setCancelled(true);
}
}

This stops the player from dragging it out there inventory.
to make it so they cant drag anything just use event.setcancelled(true); in the event

Code:

@EventHandler
public void onInventoryClickEvent(InventoryClickEvent event){
 
if(event.getCurrentItem().getType() == Material.EYE_OF_ENDER){
event.setCancelled(true);
}
}

This stops players from picking up an Eye of ender.
to make it so they cant pickup anything just use event.setcancelled(true); in the event

Code:

@EventHandler
public void onPickup(PlayerPickupItemEvent event){
 
if(item.getItemStack().getType() == Material.EYE_OF_ENDER){
event.setCancelled(true);
}
}

 

Thanks, this should help a lot

 

None of them seem to be working for me can you help?

Code:java

package me.slimey101.MainMenu;
 
import java.util.ArrayList;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
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.inventory.InventoryClickEvent;
import org.bukkit.event.player.PlayerDropItemEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerPickupItemEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
 
public class Main extends JavaPlugin implements Listener {
 
    private Visibility vis;
 
    public Object Player;
    public Inventory Main;
 
    public void onEnable(){
 
        vis = new Visibility();
 
        PluginManager pm = getServer().getPluginManager();
        pm.registerEvents(vis, this);
    }
 
    public void shorName(){
        this.Player = getName();
        this.Main = main;
    }
 
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] a){
        Player p = (Player) sender;
        if(cmd.getName().equalsIgnoreCase("ss")){
            p.openInventory(main);
        }
        return false;
    }
 
    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent e){
        Player p = e.getPlayer();
        if (e.getAction().equals(Action.RIGHT_CLICK_AIR ) || e.getAction().equals(Action.RIGHT_CLICK_BLOCK) &&
            (p.getItemInHand().getType() == Material.MAGMA_CREAM)){
            p.openInventory(main);
        }
    }
 
    // Shop Item
    ItemStack shop = new ItemStack(Material.MAGMA_CREAM);
    {
        ItemMeta itemmeta = shop.getItemMeta();
        ArrayList<String> im = new ArrayList<String>();
        itemmeta.setDisplayName(ChatColor.AQUA + "Shard Tokens");
        im.add(ChatColor.GRAY + "Shards: " + ChatColor.RED + "Coming soon");
        im.add("");
        im.add(ChatColor.GRAY + "You can get more shards by doing");
        im.add(ChatColor.GRAY + "quests or buy more shard on our");
        im.add(ChatColor.GRAY + "website that you find at:");
        im.add(ChatColor.GOLD + "[url]http://www.mc-iceage.enjin.com/[/url]");
        itemmeta.setLore(im);
        shop.setItemMeta(itemmeta);
    }
 
    // PlayerVis Item
    ItemStack PlayerVis = new ItemStack(Material.INK_SACK, 1, (short)10);
    {
        ItemMeta itemmeta = PlayerVis.getItemMeta();
        ArrayList<String> im = new ArrayList<String>();
        itemmeta.setDisplayName(ChatColor.GREEN + "Player visibility");
        im.add(ChatColor.GRAY + "Stats: " + ChatColor.GREEN + "On");
        im.add(ChatColor.GOLD + "Click to toggle");
        itemmeta.setLore(im);
        PlayerVis.setItemMeta(itemmeta);
    }
 
    // Wardrobe Item
    ItemStack Wardrobe = new ItemStack(Material.WOODEN_DOOR);
    {
        ItemMeta itemmeta = Wardrobe.getItemMeta();
        ArrayList<String> im = new ArrayList<String>();
        itemmeta.setDisplayName(ChatColor.RED + "Wardrobe");
        im.add(ChatColor.GRAY + "Coming soon!");
        itemmeta.setLore(im);
        Wardrobe.setItemMeta(itemmeta);
    }
 
    // Effects Item
    ItemStack Effects = new ItemStack(Material.MELON_SEEDS);
    {
        ItemMeta itemmeta = Effects.getItemMeta();
        ArrayList<String> im = new ArrayList<String>();
        itemmeta.setDisplayName(ChatColor.RED + "Effects");
        im.add(ChatColor.GRAY + "Coming soon!");
        itemmeta.setLore(im);
        Effects.setItemMeta(itemmeta);
    }
 
    // Trails Item
    ItemStack Trails = new ItemStack(Material.PUMPKIN_SEEDS);
    {
        ItemMeta itemmeta = Trails.getItemMeta();
        ArrayList<String> im = new ArrayList<String>();
        itemmeta.setDisplayName(ChatColor.RED + "Trails");
        im.add(ChatColor.GRAY + "Coming soon!");
        itemmeta.setLore(im);
        Trails.setItemMeta(itemmeta);
    }
 
    // Create the custom inventory
    Inventory main = Bukkit.createInventory(null, 54, ChatColor.DARK_GRAY + "Shard Menu");
    {
        // Add the ItemStack to the virtual inventory (from above)
        main.setItem(49, shop);
        main.setItem(50, PlayerVis);
        main.setItem(29, Wardrobe);
        main.setItem(31, Effects);
        main.setItem(33, Trails);
 
    }
 
    @EventHandler
    public void onEnventoryClickEvent(InventoryClickEvent e){
        e.setCancelled(true);
    }
 
    @EventHandler
    public void onPickup(PlayerPickupItemEvent e){
        e.setCancelled(true);
    }
 
    @EventHandler
    public void onPlayerDropItem(PlayerDropItemEvent e){
        e.setCancelled(true);
    }
}