Bukkit 1.20 GUI: 创建54格GUI并使用黑色玻璃板填充边框

以下是使用Java编写的Bukkit 1.20插件，创建一个大小为54格的GUI，并将四周的格子填满黑色玻璃板：

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.Arrays;

public class Main extends JavaPlugin implements Listener {

    private Inventory gui;

    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
        createGUI();
    }

    private void createGUI() {
        gui = Bukkit.createInventory(null, 54, 'My GUI');

        // Fill the outer border with black glass pane
        ItemStack blackGlass = new ItemStack(Material.BLACK_STAINED_GLASS_PANE);
        ItemMeta blackGlassMeta = blackGlass.getItemMeta();
        blackGlassMeta.setDisplayName(' ');
        blackGlass.setItemMeta(blackGlassMeta);

        // Fill the outer border with black glass pane
        for (int i = 0; i < 9; i++) {
            gui.setItem(i, blackGlass);
            gui.setItem(i + 45, blackGlass);
        }

        for (int i = 9; i <= 36; i += 9) {
            gui.setItem(i, blackGlass);
            gui.setItem(i + 8, blackGlass);
        }

        // Add other items to the GUI
        // ...

    }

    @EventHandler
    public void onInventoryClick(InventoryClickEvent event) {
        if (!event.getInventory().equals(gui)) return;

        event.setCancelled(true);

        Player player = (Player) event.getWhoClicked();
        ItemStack clickedItem = event.getCurrentItem();

        // Handle clicks on GUI items
        // ...

    }
}

请注意，这只是一个基本的插件框架，你需要根据你的需求添加其他的功能和交互逻辑。