Java "TRAP"アサーションエラー

Question

私はSpigot用のクラスを作成しています。これは、多くの新しいクラフトレシピを定義しています。しかし、イベントを呼び出すと、Assertion Error: TRAPがスローされるようです。 私はたくさんのことを研究し、有用なヒントなどを見つけていません。ここで

Items.java

package com.myththewolf.omnomnom.lib; 

import java.util.ArrayList; 
import java.util.Arrays; 
import java.util.HashMap; 
import java.util.List; 

import org.bukkit.Bukkit; 
import org.bukkit.Material; 
import org.bukkit.SkullType; 
import org.bukkit.inventory.ItemStack; 
import org.bukkit.inventory.ShapedRecipe; 
import org.bukkit.inventory.meta.ItemMeta; 
import org.bukkit.inventory.meta.SkullMeta; 

public class Items { 
    private static HashMap<ItemStack,Integer> items = new HashMap<ItemStack,Integer>(); 
    private static List<ShapedRecipe> itemC = new ArrayList<ShapedRecipe>(); 
    public ItemStack setMeta(ItemStack material, String name, List<String> lore) 
    { 
     if (((material == null) || material.getType() == Material.AIR) || ((name == null && lore == null))) 
     { 
      return null; 
     } 
     ItemMeta im = material.getItemMeta(); 
     if (name != null) 
     { 
      im.setDisplayName(name); 
     } 
     if (lore != null) 
     { 
      im.setLore(lore); 
     } 
     material.setItemMeta(im); 
     return material; 
    } 

    public static void makeRecipies() 
    { 

      ItemStack skull; 
      skull = new ItemStack(Material.SKULL_ITEM, 1, (short) SkullType.PLAYER.ordinal()); 
      SkullMeta SM; 
      SM = (SkullMeta) skull.getItemMeta(); 
      SM.setOwner("MHF_CHEST"); 
      skull.setItemMeta(SM); 
     addRecipie(3, "CCC", "BAB", "CCC", skull, Material.COOKED_BEEF, Material.BREAD, Material.AIR); 
     for(ShapedRecipe sr : itemC) 
     { 
      Bukkit.getServer().addRecipe(sr); 
     } 
    } 

    public static HashMap<ItemStack,Integer> getItems() 
    { 
     return items; 
    } 

    public static void addRecipie(int hung,String patA, String patB, String patC, ItemStack out, Material a, Material b, Material c) 
    { 
     ShapedRecipe rec = new ShapedRecipe(out); 
     rec.shape(patA,patB,patC); 
     rec.setIngredient('A', a); 
     rec.setIngredient('B', b); 
     rec.setIngredient('C', c); 
     items.put(out, hung); 
     itemC.add(rec); 
    } 
} 

RightClickEvent.java

package com.myththewolf.omnomnom.event; 

import java.util.HashMap; 

import org.bukkit.Material; 
import org.bukkit.event.EventHandler; 
import org.bukkit.event.Listener; 
import org.bukkit.event.block.Action; 
import org.bukkit.event.player.PlayerInteractEvent; 
import org.bukkit.inventory.ItemStack; 
import org.bukkit.inventory.meta.ItemMeta; 

import com.myththewolf.omnomnom.lib.Items; 

public class RightClickEvent implements Listener { 
    @EventHandler 

    public void onInteractEvent(PlayerInteractEvent e) 
    { 
     Action a= e.getAction(); 


     if(a == Action.RIGHT_CLICK_BLOCK || a== Action.RIGHT_CLICK_AIR) 
     { 

      final HashMap<ItemStack,Integer> items = Items.getItems(); 
      if(items.containsKey(e.getItem())) 
      { 
       int foodL = e.getPlayer().getFoodLevel(); 

       e.getPlayer().setFoodLevel(foodL + items.get(e.getItem())); 
       ItemStack hand = e.getPlayer().getItemInHand(); 
       int amount = hand.getAmount(); 
       if (amount > 1) { 
        hand.setAmount(amount - 1); 
        e.getPlayer().setItemInHand(hand); 
       } else { 
        e.getPlayer().setItemInHand(new ItemStack(Material.AIR)); 
       } 
      } 
     } 
    } 
} 

は、スタックトレースです：

[22:50:18 FATAL]: Error executing task 
java.util.concurrent.ExecutionException: java.lang.AssertionError: TRAP 
    at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_101] 
    at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_101] 
    at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:47) [spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:675) [spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:574) [spigot.jar:git-Spigot-f950f8e-4f47972] 
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101] 
Caused by: java.lang.AssertionError: TRAP 
    at net.minecraft.server.v1_11_R1.ItemStack.F(ItemStack.java:86) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.ItemStack.setCount(ItemStack.java:814) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.ItemStack.add(ItemStack.java:818) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.ItemStack.subtract(ItemStack.java:822) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.ItemSkull.a(ItemSkull.java:79) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.ItemStack.placeItem(ItemStack.java:152) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.PlayerInteractManager.a(PlayerInteractManager.java:491) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:897) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.PacketPlayInUseItem.a(PacketPlayInUseItem.java:37) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.PacketPlayInUseItem.a(PacketPlayInUseItem.java:1) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at net.minecraft.server.v1_11_R1.PlayerConnectionUtils$1.run(SourceFile:13) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_101] 
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_101] 
    at net.minecraft.server.v1_11_R1.SystemUtils.a(SourceFile:46) ~[spigot.jar:git-Spigot-f950f8e-4f47972] 
    ... 5 more 

まさにこのエラーが何でありますか？

私は間違っていましたか？

Answer 1

プレイヤーの手札の中に空気が置かれてブロックされている可能性があります。 Minecraftでは空気を入れることができないので、AssertionErrorが投げられます。

ソリューションは、固定PlayerInteractEvent