スピゴットプラグイン1.8.8 NullPointerEceptionここ

Question

ですFailtureコード：

[18:54:41] [Server thread/INFO]: LonghornHD_TV_YT issued server command: /switch 
[18:54:41] [Server thread/ERROR]: null 
org.bukkit.command.CommandException: Unhandled exception executing  command 'switch' in plugin DerMariosServer-Lobby v1.5.5 
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-550ebac-7019900] 
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-550ebac-7019900] 
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:646) ~[spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-550ebac-7019900] 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_101] 
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_101] 
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:696) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot.jar:git-Spigot-550ebac-7019900] 
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot.jar:git-Spigot-550ebac-7019900] 
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_101] 
Caused by: java.lang.NullPointerException 
at Main.main.switch_mode_if(main.java:253) ~[?:?] 
at Commands.commands.onCommand(commands.java:96) ~[?:?] 
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-550ebac-7019900] 
... 14 more 

ここ

コマンドクラスのコードは次のとおりです。

ここ

if(cmd.getName().equalsIgnoreCase("switch")){ 
     if(sender instanceof Player){ 
      final Player p = (Player) sender; 
      if(p.hasPermission("DerMarios.Lobby.Mode.Switch")){ 
       if(plugin.switch_mode_if(p)){ 
        p.sendMessage(prefix + "§6Du gehst jetzt in den Normal Mode."); 
        Bukkit.getScheduler().scheduleAsyncDelayedTask(plugin, new Runnable() { 

         @Override 
         public void run() { 
          plugin.switch_mode(p); 
         } 
        }, 40); 
        return true; 
       }else{ 
        p.sendMessage(prefix + "§6Du gehst jetzt in den Bau Mode."); 
        Bukkit.getScheduler().scheduleAsyncDelayedTask(plugin, new Runnable() { 

         @Override 
         public void run() { 
          plugin.switch_mode(p); 
         } 
        }, 40); 
        return true; 
       } 
      }else{ 
       p.sendMessage(prefix + "§6Du hast keine Permissions!"); 
       return true; 
      } 
     }else{ 
      ConsoleCommandSender co = plugin.getServer().getConsoleSender(); 
      co.sendMessage(prefix + "§4Der Befehl kann nur ingame ausgeführt werden!"); 
      return true; 
     } 

メインクラスのコードは次のとおりです。

package Main; 

import java.io.File; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.HashMap; 

import org.bukkit.Bukkit; 
import org.bukkit.ChatColor; 
import org.bukkit.GameMode; 
import org.bukkit.command.ConsoleCommandSender; 
import org.bukkit.configuration.file.FileConfiguration; 
import org.bukkit.configuration.file.YamlConfiguration; 
import org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer; 
import org.bukkit.entity.Player; 
import org.bukkit.event.Listener; 
import org.bukkit.plugin.java.JavaPlugin; 
import org.bukkit.potion.PotionEffect; 
import org.bukkit.potion.PotionEffectType; 

//import Extra.oldoldNick; 
import Extra.oldNick; 
import Extra.TPS; 
import Commands.commands; 
import Items.items; 
import Listener.listener_main; 
import net.minecraft.server.v1_8_R1.ChatSerializer; 
import net.minecraft.server.v1_8_R1.IChatBaseComponent; 
import net.minecraft.server.v1_8_R1.PacketPlayOutChat; 
import net.minecraft.server.v1_8_R1.PlayerConnection; 

public class main extends JavaPlugin implements Listener{ 

private String prefix = "§8[§6System§8] "; 
private static main inst; 
private ConsoleCommandSender co = getServer().getConsoleSender(); 
public HashMap<String, String> nick = new HashMap<String, String>(); 
public ArrayList<String> nonicks = new ArrayList<String>(); 
public ArrayList<String> nicks = new ArrayList<String>(); 
public static ArrayList<String> doublejump = new ArrayList<String>(); 
private ArrayList<Player> switch_mode = new ArrayList<Player>(); 
// private static float defaultSpeed = 0.2f; 

public void onLoad(){ 
    co.sendMessage(prefix + "Das LobbyPlugin wurde geladen"); 
} 

@SuppressWarnings("unchecked") 
public void onEnable(){ 
    File mk = new File("plugins//DerMarios//Lobby"); 
    final File data = new File("plugins//DerMarios//Lobby//data.yml"); 
    File data2 = new File("plugins//DerMarios//nick_names.yml"); 
    commands cm = new commands(this); 
    getCommand("gmc").setExecutor(cm); 
    getCommand("check").setExecutor(cm); 
    getCommand("nick").setExecutor(cm); 
    getCommand("farben").setExecutor(cm); 
    getCommand("zeichen").setExecutor(cm); 
    getCommand("ping").setExecutor(cm); 
    getCommand("switch").setExecutor(cm); 
    if(!(mk.mkdir())){ 
     mk.mkdirs(); 
    } 
    if(!(data.exists())){ 
     try { 
      data.createNewFile(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 
    if(!(data2.exists())){ 
     try { 
      data2.createNewFile(); 
     } catch(IOException e){ 
      e.printStackTrace(); 
     } 
    } 
    new oldNick(this); 
    FileConfiguration cg = YamlConfiguration.loadConfiguration(data); 
    FileConfiguration cg2 = YamlConfiguration.loadConfiguration(data2); 
    nonicks.add("GommeHD"); 
    nonicks.add("ungespielt"); 
    nonicks.add("LonghornHD_TV_YT"); 
    nonicks.add("PasMinecrafter"); 
    nonicks.add("DerMarios"); 
    nonicks.add("LonghornHD"); 
    if(cg2.contains("Nicks")){ 
     nicks = (ArrayList<String>) cg2.getList("Nicks"); 
    }else{ 
     nicks.add("Bruiser"); 
     nicks.add("Punisher"); 
     nicks.add("Heavy Hands"); 
     nicks.add("Knock Out"); 
     nicks.add("Studd"); 
     nicks.add("Punk"); 
     nicks.add("Wild Thing"); 
     nicks.add("Superhuman"); 
     nicks.add("Disgusting"); 
     nicks.add("Filthy"); 
     nicks.add("Dangerous"); 
     nicks.add("Desiel"); 
     nicks.add("Strong"); 
     nicks.add("Amazing"); 
     nicks.add("Excellent"); 
     nicks.add("Big Bang"); 
     nicks.add("Ankle Breaker"); 
     nicks.add("The Freak"); 
     nicks.add("Riot Boy"); 
     nicks.add("Killer"); 
     nicks.add("Super Human"); 
     nicks.add("The Amazon"); 
     nicks.add("Beautiful"); 
     nicks.add("El Diablo"); 
     nicks.add("Snow Man"); 
     nicks.add("Hopeless"); 
     nicks.add("Renegade"); 
     nicks.add("Blue Print"); 
     nicks.add("The Ruler"); 
     nicks.add("Friend or Foe"); 
     nicks.add("The Prisident"); 
     nicks.add("The Politican"); 
     nicks.add("Cupid"); 
     nicks.add("The Jokester"); 
     nicks.add("The Chokester"); 
     nicks.add("Bone Snapper"); 
     nicks.add("The Dentist"); 
     nicks.add("TheBoneRealing"); 
     nicks.add("Emotionless"); 
     nicks.add("The Bloody"); 
     nicks.add("Famous"); 
     nicks.add("Rich"); 
     nicks.add("Street Chemist"); 
     nicks.add("The Ghost"); 
     nicks.add("The Battler"); 
     nicks.add("TheCigarSmoker"); 
     nicks.add("Sugar"); 
     nicks.add("The Dancer"); 
     nicks.add("Moon Walker"); 
     nicks.add("Grown Up"); 
     nicks.add("Shorty"); 
     nicks.add("Fast and Lound"); 
     nicks.add("The Strom"); 
     nicks.add("End of the Line"); 
     cg2.set("Nicks", nicks); 
     try { 
      cg2.save(data2); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 
    if(cg.contains("No-Nicks")){ 
     nonicks = (ArrayList<String>) cg.getList("No-Nicks"); 
    } 
    cg.set("No-Nicks", nonicks); 
    try { 
     cg.save(data); 
    } catch (IOException e1) { 
     e1.printStackTrace(); 
    } 
    Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new TPS(), 0L, 1L); 
    co.sendMessage(prefix + "§eDas LobbyPlugin wurde erfolgreich geladen!"); 
    new listener_main(this); 
    new items(this); 
    new oldNick(this); 
    Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new Runnable() { 

     @Override 
     public void run() { 
      for(Player OnlinePlayer : Bukkit.getOnlinePlayers()){ 
       FileConfiguration cfg = YamlConfiguration.loadConfiguration(data); 
       if(cfg.contains("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.TimeEnd")){ 
        long current = System.currentTimeMillis(); 
        long End = cfg.getLong("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.TimeEnd"); 
        long Test = End-current; 
        if(Test <= 0){ 
         String Traget = cfg.getString("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.Target"); 
         if(Bukkit.getPlayer(Traget) != null){ 
          Player T = Bukkit.getPlayer(Traget); 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.You", null); 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.Target", null); 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.TimeEnd", null); 
          OnlinePlayer.sendMessage(prefix + "§6Die Zeit ist um! Die Anfrage wurde abgebrochen!"); 
          T.sendMessage(prefix + "§6Die Zeit ist um! Du hattes Zeit um die Anfrage anzunehmen oder abzulehenen!"); 
          try { 
           cfg.save(data); 
          } catch (IOException e) { 
           e.printStackTrace(); 
          } 
          return; 
         }else{ 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.You", null); 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.Target", null); 
          cfg.set("Freunde." + OnlinePlayer.getUniqueId() + ".Anfrage.TimeEnd", null); 
          OnlinePlayer.sendMessage(prefix + "§6Die Anfrage wurde abgebrochen!"); 
          try { 
           cfg.save(data); 
          } catch (IOException e) { 
           e.printStackTrace(); 
          } 
         } 
        } 
       } 
      } 
     } 
    }, 1, 1); 
} 

public void onDisable(){ 


    co.sendMessage(prefix + "Das LobbyPlugin wurde erfolgreich beendet!"); 


} 
public void sendActionBar(Player p, String m){ 
    if(m == null) m = ""; 
    m = ChatColor.translateAlternateColorCodes('&', m); 
    m = m.replaceAll("%PLAYER%", p.getDisplayName()); 

    PlayerConnection con = ((CraftPlayer)p).getHandle().playerConnection; 

    IChatBaseComponent chat = ChatSerializer.a("{\"text\": \"" + m + "\"}"); 
    PacketPlayOutChat packet = new PacketPlayOutChat(chat,(byte) 2); 
    con.sendPacket(packet); 

} 

public static void setUltraSpeed(Player p){ 
    p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, Integer.MAX_VALUE, 3)); 
} 

public static void setSchnellerSpeed(Player p){ 
    p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, Integer.MAX_VALUE, 2)); 
} 

public static void setSchnellSpeed(Player p){ 
    p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, Integer.MAX_VALUE, 1)); 
} 

public static void setNormalSpeed(Player p){ 
    p.removePotionEffect(PotionEffectType.SPEED); 
} 

public static void switch_mode(Player p){ 
    if(switch_mode_if(p)){ 
     inst.switch_mode(p, false); 
    }else{ 
     inst.switch_mode(p, true); 
    } 
} 

public static boolean switch_mode_if(Player p){ 
    if(inst.switch_mode_code_if(p)){ 
     return true; 
    }else{ 
     return false; 
    } 
} 


public boolean switch_mode_code_if(Player p){ 
    if(switch_mode.contains(p)){ 
     GameMode c = GameMode.CREATIVE; 
     p.getInventory().clear(); 
     p.setGameMode(c); 
     return true; 
    }else{ 
     return false; 
    } 
} 

public void switch_mode(Player p, boolean switchmode){ 
    if(switchmode){ 
     switch_mode.add(p); 
    }else{ 
     switch_mode.remove(p); 
    } 
} 

public String getPrefix(){ 
    return prefix; 
} 
} 

私がコマンドを実行すると、エラーが表示されます。 私はすでに2時間見ましたが、残念ながら何も見つかりませんでした。 私があなたを助けてくれることを願っています。

Answer 1

あなたはスタックトレースを見てみる場合は、例外があったと見ることができます：

Caused by: java.lang.NullPointerException 
at Main.main.switch_mode_if(main.java:253) ~[?:?] 

これは、（ライン253）法switch_mode_ifでNullPointerExceptionがあることを示しています：

public static boolean switch_mode_if(Player p){ 
if(inst.switch_mode_code_if(p)){ 
    return true; 
}else{ 
    return false; 
} 

このメソッドでNullPointerExceptionをスローする唯一の方法は、instがnullの場合です。 private static main inst;は決して初期化されておらず（値が与えられている）、例外がスローされることがわかります。

これを修正するには、onEnable()にinst = this;を入力します。

あなたは、スタックの読み方を知っていた場合は、この自分で解決している可能性が自分をトレースします。 java - What is a stack trace, and how can I use it to debug my application errors?