Spigot Coding Episode 2

import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Core extends JavaPlugin {

    @Override
    public void onEnable() {
        getLogger().info("ClearInv has been enabled!");
    }

    @Override
    public void onDisable() {
        getLogger().info("ClearInv has been Disabled!");
    }

    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if (!(sender instanceof Player)) {
            sender.sendMessage("§4Console is not a player!");
        }

        Player player = (Player) sender;
        org.bukkit.inventory.PlayerInventory playeri = player.getInventory();

        if (cmd.getName().equalsIgnoreCase("ci")) {
            if (player.hasPermission("ci.ci") || (player.isOp())) {
            playeri.clear();
            player.sendMessage("§aYour inventory has been cleared, §e" + player.getName() + "§a!");
        }
    }
        return false;
    }