Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Cannot invoke "net.jitse.npclib.api.NPC.setLocation()" because "npc" is null #176

Open
ayabusa opened this issue Jan 2, 2022 · 6 comments
Open

Cannot invoke "net.jitse.npclib.api.NPC.setLocation()" because "npc" is null #176

ayabusa opened this issue Jan 2, 2022 · 6 comments

Comments

@ayabusa
Copy link

ayabusa commented Jan 2, 2022

Hello,
I'm trying to use your api on my 1.18.1 spigot server but I have an issue :
When i try to setLocation() before creating my npc I get the message below in the console.
I have checked my code, but cannot find what I did wrong...
Any idea on how to solve it ?

thanks a bunch :)

NPCLib Failed to create NPC. Please report the following stacktrace message
java.lang.NullPointerException: Cannot invoke "java.lang.Class.getConstructors()" because "this.npcClass" is null
        at net.jitse.npclib.NPCLib.createNPC(NPCLib.java:114) ~[?:?]
        at net.jitse.npclib.NPCLib.createNPC(NPCLib.java:128) ~[?:?]
        at fr.ayabusa.ignifusplugin.commands.CommandSpawnNpc.onCommand(CommandSpawnNpc.java:32) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-api-1.18.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-api-1.18.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_18_R1.CraftServer.dispatchCommand(CraftServer.java:821) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1939) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1778) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1759) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:46) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:30) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:151) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.c(SourceFile:23) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1158) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:1) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.y(SourceFile:125) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.bf(MinecraftServer.java:1137) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1130) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:134) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1114) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1038) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:304) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at java.lang.Thread.run(Thread.java:833) [?:?]
[17:39:16] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spawnnpc' in plugin Ignifus_plugin v0.1
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[spigot-api-1.18.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[spigot-api-1.18.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_18_R1.CraftServer.dispatchCommand(CraftServer.java:821) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1939) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1778) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:1759) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:46) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.game.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:30) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:151) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.c(SourceFile:23) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1158) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:1) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.y(SourceFile:125) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.bf(MinecraftServer.java:1137) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.y(MinecraftServer.java:1130) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:134) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1114) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1038) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:304) ~[spigot-1.18.1-R0.1-SNAPSHOT.jar:3384-Spigot-78a14d9-b8a25cb]
        at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "net.jitse.npclib.api.NPC.setLocation(org.bukkit.Location)" because "npc" is null
        at fr.ayabusa.ignifusplugin.commands.CommandSpawnNpc.onCommand(CommandSpawnNpc.java:34) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[spigot-api-1.18.1-R0.1-SNAPSHOT.jar:?]
        ... 21 more

My code :

  public class CommandSpawnNpc implements CommandExecutor {
  
	  @Override
	  public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
		  // TODO Auto-generated method 
		  
		  Player p = (Player)sender;
          
		  NPCLib librairie = main.library;
		  
		  List<String> name = new ArrayList<String>();
		  name.add("§bSmurf");
		  name.add("§2click to teleport");
		  
		  NPC npc = librairie.createNPC(name);
		  npc.setLocation(p.getLocation());
	          npc.create();
	          npc.show(p);
	      
		  return false;
	  }
  }
@DxsSucuk
Copy link

Check if the NPC is null?

@ayabusa
Copy link
Author

ayabusa commented Jan 20, 2022

Yes he is null but I don't know why

@DxsSucuk
Copy link

Is your instance of the NPCLib null?

@ayabusa
Copy link
Author

ayabusa commented Jan 28, 2022

sorry for the delay in response.
so no my instance is not null, thank you for your reply but I think I will give up with the library and try the official way to spawn NPC.

@DxsSucuk
Copy link

There is a official way to spawn NPCs?
And I think I found the problem the plugin doesn't support the Server version you are using (maybe?).

@ayabusa
Copy link
Author

ayabusa commented Jan 31, 2022

so this is the "official way" (without plugin or lib) to spawn NPC :
https://www.spigotmc.org/threads/how-to-create-and-modify-npcs.400753/

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
2 participants
@DxsSucuk @ayabusa