Spigot Tablist prefix 1.13+

[TntTastisch]

Hey,
Ich programmiere derzeit für meine Community ein Tablist Prefix.
In der Konsole kommt ständig ein nerviger Unerklärlicher Fehler:

     @EventHandler
    public void onJoin(PlayerJoinEvent event){
        String header = this.getConfig().getString("System.Header");
        String footer = this.getConfig().getString("System.Footer");
         try {
             final TabPlayer disconnectedPlayer = Shared.getPlayer(event.getPlayer());
             Placeholders.recalculateOnlineVersions();

             final List<Integer> ids = new ArrayList<Integer>();
             final int[] idsArr = new int[ids.size()];
             for (int i = 0; i < idsArr.length; ++i) {
                 idsArr[i] = ids.get(i);
             }
             ((TablistAPI)Shared.packetAPI).sendTabHF(event.getPlayer().getName(), header, footer);

         }
         catch (Exception ex) {
             ex.printStackTrace();
         }
    }

Spoiler: Fehlermeldung

[13:05:14 WARN]: java.lang.NullPointerException
[13:05:14 WARN]: at de.TntTastisch.Spigot.Tablist.onJoin(Tablist.java:69)
[13:05:14 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[13:05:14 WARN]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[13:05:14 WARN]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[13:05:14 WARN]: at java.lang.reflect.Method.invoke(Unknown Source)
[13:05:14 WARN]: at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java05)
[13:05:14 WARN]: at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[13:05:14 WARN]: at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500)
[13:05:14 WARN]: at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.PlayerList.onPlayerJoin(PlayerList.java43)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.PlayerList.a(PlayerList.java:162)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.LoginListener.b(LoginListener.java:149)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.LoginListener.tick(LoginListener.java:53)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.NetworkManager.a(NetworkManager.java:230)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.ServerConnection.c(ServerConnection.java:119)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:993)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:830)
[13:05:14 WARN]: at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:728)
[13:05:14 WARN]: at java.lang.Thread.run(Unknown Source)

Könnte irgendjemand mir Weiterhelfen?
Danke schon mal im vor raus.


Mit freundlichen Grüßen,
TntTastisch

 

[DerFrZocker]

Es wäre hilfreich zu wissen welche die 69 Zeile ist.

Und dann würde mich noch interessieren was das bewirken soll:

final List<Integer> ids = new ArrayList<Integer>(); final int[] idsArr = new int[ids.size()]; for (int i = 0; i < idsArr.length; ++i) { idsArr = ids.get(i); }

 

[TntTastisch]

Die Zeile 69 ist die hier

 ((TablistAPI)Shared.packetAPI).sendTabHF(event.getPlayer().getName(), header, footer);

 

[TntTastisch]

Ich habe den Code wie folgt geupgraded:

    @EventHandler
    public void onJoin(PlayerJoinEvent event){
         TabPlayer p = Shared.getPlayer(event.getPlayer());
         try {
             String header = this.getConfig().getString("System.Header");
             String footer = this.getConfig().getString("System.Footer");
             Placeholders.recalculateOnlineVersions();

             ((TablistAPI)Shared.packetAPI).sendTabHF(p.getPlayer(), header, footer);

         }
         catch (Exception ex) {
             ex.printStackTrace();
         }
    }

[13:19:16 WARN]: java.lang.NullPointerException
[13:19:16 WARN]:        at de.TntTastisch.Spigot.Tablist.onJoin(Tablist.java:63)
[13:19:16 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[13:19:16 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[13:19:16 WARN]:        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[13:19:16 WARN]:        at java.lang.reflect.Method.invoke(Unknown Source)
[13:19:16 WARN]:        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305)
[13:19:16 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[13:19:16 WARN]:        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500)
[13:19:16 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.PlayerList.onPlayerJoin(PlayerList.java:343)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.PlayerList.a(PlayerList.java:162)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.LoginListener.b(LoginListener.java:149)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.LoginListener.tick(LoginListener.java:53)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.NetworkManager.a(NetworkManager.java:230)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.ServerConnection.c(ServerConnection.java:119)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:993)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:830)
[13:19:16 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:728)
[13:19:16 WARN]:        at java.lang.Thread.run(Unknown Source)

 

[TntTastisch]

63 ist übrigens dies hier:

 ((TablistAPI)Shared.packetAPI).sendTabHF(p.getPlayer(), header, footer);

 

[DerFrZocker]

Ich vermute mal das

Shared.packetAPI

"null" zurück gibt. Wird die Variable auch richtig gesetzt?

 

[TntTastisch]

Ja wird richtig gesetzt.

 

[PSandro]

Was du noch versuchen kannst ist, den Code etwas über mehrere Zeile zu "strecken" um die Fehlermeldung auf eine konkrete Aktion zurückführen zu können. Ein paar null checks sind bestimmt auch hilfreich:

@EventHandler
public void onJoin(PlayerJoinEvent event){
    TabPlayer p = Shared.getPlayer(event.getPlayer());
    TablistAPI tablist = Shared.packetAPI;
    if (tablist == null) {
        System.err.println("TablistAPI cannot be null!");
        return;
    }
    if (p == null) {
        System.err.println("p cannot be null!");
        return;
    }
    try {
        String header = this.getConfig().getString("System.Header");
        String footer = this.getConfig().getString("System.Footer");
        Placeholders.recalculateOnlineVersions();

        if (header == null || footer == null) {
            System.err.println("Header/Footer cannot be null!");
            return;
        }

        tablist.sendTabHF(p.getPlayer(), header, footer);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}