847696260
运行时有错报，错报如下：
[08:19:18] [Server thread/ERROR]: Could not pass event EntityDamageByEntityEvent to ExpSword v0.1
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:87) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:553) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:466) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:585) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.EntityLiving.d(EntityLiving.java:1107) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.EntityLiving.damageEntity(EntityLiving.java:743) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.EntityMonster.damageEntity(EntityMonster.java:42) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.EntityHuman.attack(EntityHuman.java:1002) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.EntityPlayer.attack(EntityPlayer.java:1086) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1358) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:52) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.PacketPlayInUseEntity.a(SourceFile:11) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_202]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_202]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:772) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:711) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:614) [mc.jar:git-PaperSpigot-e489049-07c3001]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_202]
Caused by: java.lang.NullPointerException
        at com.Main.damage(Main.java:70) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_202]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_202]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_202]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_202]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[mc.jar:git-PaperSpigot-e489049-07c3001]
        ... 24 more



错报发生原因：使用原版物品攻击生物发生错报
主要指令如下
        @EventHandler
        public void damage(EntityDamageByEntityEvent e) {
                Entity p = e.getDamager();
                if (p instanceof Player) {
                        ItemStack hand = ((Player) p).getItemInHand();
                                List<String> loreList = hand.getItemMeta().getLore();
                                for (String a:loreList){
                                        if(((Player) p) != null && a.contains(lo)){

                                        //运行
                                        }

1378495772
本帖最后由 1378495772 于 2020-5-21 09:15 编辑
Caused by: java.lang.NullPointerException


你需要 hasLore 看看它有木有 lores
847696260
1378495772 发表于 2020-5-21 09:14
你需要 hasLore 看看它有木有 lores

哦...有点明白了我先自己试试看下
yhzyhz
要判断手上有没有物品的。
也就是判断手上物品的种类是不是空气
  1. if(((Player)p).getItemInHand().getType().equals(Material.AIR))return;
复制代码

然后再取物品，再判断有没有lore
  1. if(!item.getItemMeta().hasLore())return;
复制代码
847696260
1378495772 发表于 2020-5-21 09:14
你需要 hasLore 看看它有木有 lores

已经成功了不过我使用的是判断玩家手持物品是否有lore
haslore我试了好久不出来，请教一下haslore在这里应该怎么用
qq2479976168
看不懂！！！！！！！！！！！！
结城希亚
847696260 发表于 2020-5-21 09:53
已经成功了不过我使用的是判断玩家手持物品是否有lore
haslore我试了好久不出来，请教一下haslore在这里 ...

你是直接hasLore的吧
要先getItemMeta
847696260
结城希亚 发表于 2020-5-21 10:37
你是直接hasLore的吧
要先getItemMeta

正解，问题解决谢谢
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