Search the Forums BEFORE making a new post.

Error when trying to save to NBT

Posted August 28, 201312 yr

Hey everyone,

Firstly I need to paste my code to further explain so here it is:

package net.madcrazydrumma;

import net.minecraft.client.Minecraft;
import net.minecraft.client.entity.EntityClientPlayerMP;
import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagInt;

public class SkillMethods
{
private Minecraft mc = Minecraft.getMinecraft();
private EntityClientPlayerMP player = mc.thePlayer;

NBTTagCompound tag = player.getEntityData();

NBTBase swordsLevel = tag.getTag("swordsLevel");
NBTBase woodcuttingLevel = tag.getTag("woodcuttingLevel");
NBTBase bowsLevel = tag.getTag("bowsLevel");
NBTBase farmingLevel = tag.getTag("farmingLevel");

public SkillMethods() {}

public int getSwordsLevel() {
	return ((NBTTagInt)swordsLevel).data;
}
public int getWoodcuttingLevel() {
	return ((NBTTagInt)woodcuttingLevel).data;
}
public int getBowsLevel() {
	return ((NBTTagInt)bowsLevel).data;
}
public int getFarmingLevel() {
	return ((NBTTagInt)farmingLevel).data;
}

public void addSwordsLevel(int par1) {
	tag.setInteger("swordsLevel", (((NBTTagInt)swordsLevel).data) += par1);
}
public void addWoodcuttingLevel(int par1) {
	tag.setInteger("woodcuttingLevel", (((NBTTagInt)woodcuttingLevel).data) += par1);
}
public void addBowsLevel(int par1) {
	tag.setInteger("bowsLevel", (((NBTTagInt)bowsLevel).data) += par1);
}
public void addFarmingLevel(int par1) {
	tag.setInteger("farmingLevel", (((NBTTagInt)farmingLevel).data) += par1);
}
}

Now the error is throwing a nullpointer for this line: NBTTagCompound tag = player.getEntityData(); and the game just crashes...

Here is the full error log:

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 8/28/13 10:15 AM
Description: Initializing game

java.lang.NullPointerException
at net.madcrazydrumma.SkillMethods.<init>(SkillMethods.java:14)
at net.madcrazydrumma.OverhaulEvents.<init>(OverhaulEvents.java:17)
at net.madcrazydrumma.Overhaul.load(Overhaul.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:540)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:194)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:105)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:697)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:232)
at net.minecraft.client.Minecraft.startGame(Minecraft.java:506)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:796)
at net.minecraft.client.main.Main.main(Main.java:93)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.madcrazydrumma.SkillMethods.<init>(SkillMethods.java:14)
at net.madcrazydrumma.OverhaulEvents.<init>(OverhaulEvents.java:17)
at net.madcrazydrumma.Overhaul.load(Overhaul.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:540)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:194)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:105)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:697)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:232)
at net.minecraft.client.Minecraft.startGame(Minecraft.java:506)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:796)
at net.minecraft.client.main.Main.main(Main.java:93)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 945042856 bytes (901 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v8.04 FML v6.2.35.804 Minecraft Forge 9.10.0.804 4 mods loaded, 4 mods active
mcp{8.04} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
FML{6.2.35.804} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
Forge{9.10.0.804} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
overhaul{1.6.2} [Overhaul] (bin) Unloaded->Constructed->Pre-initialized->Errored
Launched Version: 1.6
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.2843, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

Thank you for the help!

Quote

August 28, 201312 yr

Author

@diesieben what shall i use then?

Quote

August 28, 201312 yr

Author

I tried using that, but i didnt know where to start..

Any help? Thanks i really appreciate it

EDIT::

I made the method:

@ForgeSubscribe
public void constructEntity(EntityEvent.EntityConstruction event) {
    
}

but what next?

Quote

August 28, 201312 yr

Author

This is my skill handler class:

package net.madcrazydrumma;

import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.world.World;
import net.minecraftforge.common.IExtendedEntityProperties;
import net.minecraftforge.event.ForgeSubscribe;
import net.minecraftforge.event.entity.EntityEvent;

public class SkillsHandler implements IExtendedEntityProperties
{
public int swordsLevel;

public SkillsHandler instance;

@Override
public void saveNBTData(NBTTagCompound compound) {
	compound.setInteger("swordsLevel", swordsLevel);
}

@Override
public void loadNBTData(NBTTagCompound compound) {
	compound.getInteger("swordsLevel");
}

@Override
public void init(Entity entity, World world) {
}

@ForgeSubscribe
public void constructEntity(EntityEvent.EntityConstructing event) {
	if(event.entity instanceof EntityPlayer) {
		instance = new SkillsHandler();
	}
}
}

Is that what you mean?

I dont know what you mean by registering instance with identifier and then how to use player.getExtendedProperties(identifier)

Quote

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.

Reply to this topic...

https://forums.minecraftforge.net/topic/11758-error-when-trying-to-save-to-nbt/

Followers

Go to topic listing

IPS spam blocked by CleanTalk.

Announcements

Bad pathfinding for big mobs (1.21.1)

Well I was mainly trying to figure out whether or not I was doing something wrong and if it could be fixed by just adding something (e.g. maybe I was missing an Attribute or something like that), but if that's not the case then my only option is to use custom pathfinding. If someone has one that functions and is willing to share it, then I'd gladly use that instead of suffering through making my own.

By VictorEvers · 7 hours ago7 hr
how do i change my username with forge?

In the future I do plan on adding optional OAuth to the new launcher in ForgeGradle 7. But yes, using --username and offline mode is a good workaround to not using accounts in the development environment, especially considering that the server is on LAN.

By Jonathing · 8 hours ago8 hr
how do i change my username with forge?

I came across this post looking for an answer to the OP's question. My use case is a classroom with one server in LAN and many clients of course participants that want to test their mods.

The answer is:
On the client
Edit build.gradle. In the section client add the following line before the closing curly brace: args '--username', '<YOUR NAME>'. Replace <YOUR NAME> with your actual username. E.g. if your username is lmoellendorf the client section should look like this:

client { // Comma-separated list of namespaces to load gametests from. Empty = all namespaces. property 'forge.enabledGameTestNamespaces', mod_id args '--username', 'lmoellendorf' }
Make sure that each username is unique on your server.

Start your Minecraft Client. Click Multiplayer then Direct Conection. Here enter the Server address which is the local IP of your server followed by colon : followed by the default port 25565. E.g. if your server's IP is 192.168.0.7 the entry should look like this:

192.168.0.7:25565
On the server

Be sure that in run/server.properties the line online-mode is set to false:

online-mode=false

By lmoellendorf · 8 hours ago8 hr
Forge 59.0 Minecraft 1.21.9

By Jonathing · Posted Thursday at 01:09 AM2 days
Forge 58.1 Minecraft 1.21.8

By Jonathing · Posted Thursday at 01:08 AM2 days

AidenJules_

Sign In

Error when trying to save to NBT

Featured Replies

Join the conversation

Posts

Bad pathfinding for big mobs (1.21.1)

how do i change my username with forge?

how do i change my username with forge?

Forge 59.0 Minecraft 1.21.9

Forge 58.1 Minecraft 1.21.8

Who's Online (See full list)

Important Information

Account

Navigation

Search

Configure browser push notifications

Chrome (Android)

Chrome (Desktop)

Safari (iOS 16.4+)

Safari (macOS)

Edge (Android)

Edge (Desktop)

Firefox (Android)

Firefox (Desktop)