Minecraft plugin #2

package me.emis.labaspasauli.commands;

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import me.emis.labaspasauli.Main;

public class HelloCommand implements CommandExecutor{

    @SuppressWarnings("unused")
    private Main plugin;

    public HelloCommand(Main plugin) {
    this.plugin = plugin;
    plugin.getCommand("Labas").setExecutor(this);
    }
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (!(sender instanceof Player)){
            sender.sendMessage("Tik žaidėjai gali naudotis šitą komanda.");
            return true;
        }

        Player p = (Player) sender;

        if (p.hasPermission("hello.use")) {
            p.sendMessage("Labas!");
        } else {
            p.sendMessage("Tu neturi leidimo įvykdyti šitą komandą.");
        }

        return false;
    }
}