Error when trying to save to NBT

[madcrazydrumma]

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!

[madcrazydrumma]

@diesieben what shall i use then?

[madcrazydrumma]

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?

[madcrazydrumma]

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)