InventoryClickEvent doesn't work.

Code:

@EventHandler
public void onInventoryClick(InventoryClickEvent E) {
    if (E.getWhoClicked() instanceof Player) {
        Player P = Bukkit.getPlayer(E.getWhoClicked().getName());

        ItemStack ULBoots = new ItemStack(Material.DIAMOND_BOOTS);
        ItemMeta UL_Make = ULBoots.getItemMeta();

        ArrayList<String> UL_Lore = new ArrayList<String>();
        UL_Lore.add(ChatColor.AQUA+"Survivor");
        UL_Make.setLore(UL_Lore);
        ULBoots.setItemMeta(UL_Make);

        if (E.getCurrentItem().getType() == Material.DIAMOND_BOOTS && P.getInventory().getBoots() == null)
            P.getInventory().setBoots(ULBoots);
    }
}

I want to make player not unequip diamond boots of which name is §bSurvivor .
But it doesn't work, so I removed if-condition and executed again, and doesn't work too.
I think InventoryClickEvent may have a problem, or I made something mistakes?
Please tell me what I'm wrong..

 

1. Have you registered the events?
2. Does the class implement Listener?
3. Why:
   Code:java

   Player P = Bukkit.getPlayer(E.getWhoClicked().getName());

Should be

Code:java

Player p = (Player) e.getWhoClicked();

 

1, 2.

Code:java

public class Main extends JavaPlugin implements Listener {
    public final Logger sLog = Logger.getLogger("Minecraft");
    public static Main plugin;
 
    @Override
    public void onEnable() {
        PluginDescriptionFile CVpd = this.getDescription();
        this.sLog.info(CVpd.getName()+" "+CVpd.getVersion()+" is enabled now.");
 
        PluginManager PM = getServer().getPluginManager();
        PM.registerEvents(this, this);
    }

is this right?

3. I changed it thanks

 

Is your listener in your Main class?

 

I already added.

 

Show your whole class