Added WitherChest, Interactive GUI

src/main/java/com/night/nullvalkyrie/Main.java

@@ -40,6 +40,7 @@ public final class Main extends JavaPlugin implements Listener {
                 BarStyle.SEGMENTED_12
         );
         Bukkit.getPluginManager().registerEvents(this, this);
+        Bukkit.getPluginManager().registerEvents(new MenuListener(), this);
     }
 
     @EventHandler

src/main/java/com/night/nullvalkyrie/MenuListener.java

@@ -0,0 +1,37 @@
+package com.night.nullvalkyrie;
+
+import com.night.nullvalkyrie.commands.MenuCommand;
+import org.bukkit.ChatColor;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+public class MenuListener implements Listener {
+
+    @EventHandler
+    public void onClick(InventoryClickEvent e) {
+        if(e.getInventory().equals(MenuCommand.inv) && e.getCurrentItem() != null) {
+            e.setCancelled(true);
+            Player player = (Player) e.getWhoClicked();
+            switch (e.getRawSlot()) {
+                case 0:
+                    break;
+                case 20:
+                    player.setHealth(0);
+                    player.sendMessage(ChatColor.RED + "又做兵 抵死");
+                    break;
+                case 22:
+                    break;
+                case 24:
+                    player.closeInventory();
+                    player.openInventory(WitherChest.witherchest);
+                    return;
+                default:
+                    return;
+            }
+
+
+            player.closeInventory();
+        }
+    }
+}

src/main/java/com/night/nullvalkyrie/WitherChest.java

@@ -0,0 +1,9 @@
+package com.night.nullvalkyrie;
+
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.inventory.Inventory;
+
+public class WitherChest {
+    public static Inventory witherchest = Bukkit.createInventory(null,54, ChatColor.DARK_AQUA + "Whiter Chest");
+}

src/main/java/com/night/nullvalkyrie/commands/MenuCommand.java

@@ -14,11 +14,13 @@ import org.bukkit.inventory.meta.ItemMeta;
 import java.util.Arrays;
 
 public class MenuCommand implements CommandExecutor {
+    public static Inventory inv = Bukkit.createInventory(null, 45, ChatColor.DARK_BLUE.toString() + ChatColor.BOLD + "Valkyrie Menu");
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+
         if(sender instanceof Player) {
             Player player = (Player) sender;
-            Inventory inv = Bukkit.createInventory(player,45, ChatColor.DARK_BLUE.toString() + ChatColor.BOLD + "Valkyrie Menu");
+            inv = Bukkit.createInventory(player,45, ChatColor.DARK_BLUE.toString() + ChatColor.BOLD + "Valkyrie Menu");
 
             ItemStack KYS = new ItemStack(Material.WOODEN_SWORD);
             ItemMeta KYSmeta = KYS.getItemMeta();