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[Unsolved]Creative Tab NullPointerException when Rendering

ean521

By ean521
in Modder Support

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ean521 Tree Puncher

ean521

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I got this during a crash in Eclipse when I attempted to move onto the second page of tabs:

 

Time: 5/6/14 4:19 PM

Description: Rendering item

 

java.lang.NullPointerException: Rendering item

at net.minecraft.item.ItemStack.getItemDamage(ItemStack.java:266)

at net.minecraft.client.renderer.entity.RenderItem.renderItemIntoGUI(RenderItem.java:415)

at net.minecraft.client.renderer.entity.RenderItem.renderItemAndEffectIntoGUI(RenderItem.java:560)

at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147051_a(GuiContainerCreative.java:966)

atnet.minecraft.client.gui.inventory.GuiContainerCreative.drawGuiContainerBackgroundLayer(GuiContainerCreative.java:794)

at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:97)

at net.minecraft.client.renderer.InventoryEffectRenderer.drawScreen(InventoryEffectRenderer.java:44)

at net.minecraft.client.gui.inventory.GuiContainerCreative.drawScreen(GuiContainerCreative.java:672)

at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:1143)

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1023)

at net.minecraft.client.Minecraft.run(Minecraft.java:910)

at net.minecraft.client.main.Main.main(Main.java:112)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

 

 

I honestly cannot figure out how to fix it. I know it has something to do with the item on the tab label. I am using Forge

1.7.2-10.12.1.1060 if it helps. Here also is the code for my tab and every reference to it:

 

 

package com.gmail.eanwowmaster;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.block.material.Material;

public class EancraftTabs extends CreativeTabs {

public EancraftTabs(String tabLabel) {
	super(tabLabel);
}

@Override
@SideOnly(Side.CLIENT)
public Item getTabIconItem() {
	return Item.getItemFromBlock(new EanOre(Material.rock));
}
}

public static CreativeTabs eancraftTab = new EancraftTabs("Eancraft");

	setCreativeTab(Eancraft.eancraftTab);

(I didn't put the code directly above in several times because it would be a waste of my typing and your reading)

 

 

Can anybody help me? I honestly have no idea how to fix it. I am new to Forge modding and this is my first mod, so I'm not surprised I can't fix this error.

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larsgerrits Reality Controller

larsgerrits

Posted
Posted

Before the "Eancraft" in the CreativeTab initilialization, put CreativeTas.getNextId().

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.

 

1.12 -> 1.13 primer by williewillus.

 

1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.

 

http://www.howoldisminecraft1710.today/

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GotoLink World Shaper

GotoLink

Posted
Posted 

return Item.getItemFromBlock(new EanOre(Material.rock));

You need to return a registered item or block. That new stuff isn't registered, Minecraft can't render it.

Replace with an instance you made and registered in the FMLPreInitialization event.

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ean521 Tree Puncher

ean521

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Thank you, but I got the same error after changing the code to an instance of EanOre. The new code is:

 

 

package com.gmail.eanwowmaster;

 

import cpw.mods.fml.relauncher.Side;

import cpw.mods.fml.relauncher.SideOnly;

import net.minecraft.creativetab.CreativeTabs;

import net.minecraft.init.Blocks;

import net.minecraft.item.Item;

import net.minecraft.block.material.Material;

 

public class EancraftTabs extends CreativeTabs {

 

public EancraftTabs(String lable) {

super(lable);

}

 

@Override

@SideOnly(Side.CLIENT)

public Item getTabIconItem() {

return Item.getItemFromBlock(Eancraft.eanOre);

}

}

 

 

I honestly thought that would fix it. Well, is there actually a way to fix it?

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ean521 Tree Puncher

ean521

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I just ran it with a breakpoint and it is null... so how am I supposed to make it not null? BTW, it has items in it. EXAMPLE:

 

 

package com.gmail.eanwowmaster;

import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraft.potion.PotionEffect;

public class Sushi extends Item {

protected Sushi() {
	setCreativeTab(Eancraft.eancraftTab);
	setUnlocalizedName("Sushi");
	setTextureName("eancraft:Sushi");
	setMaxStackSize(64);
}

public ItemStack onEaten(ItemStack itemStack, World world, EntityPlayer player) {
	player.addExhaustion(4.0F);
	player.addPotionEffect(new PotionEffect(9, 1, 1));
	player.addPotionEffect(new PotionEffect(5, 2, 1));
	return itemStack;
}
}

 

 

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Jacky2611 Diamond Finder

Jacky2611

Posted
Posted

I just ran it with a breakpoint and it is null... so how am I supposed to make it not null? BTW, it has items in it. EXAMPLE:

 

 

package com.gmail.eanwowmaster;

import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraft.potion.PotionEffect;

public class Sushi extends Item {

protected Sushi() {
	setCreativeTab(Eancraft.eancraftTab);
	setUnlocalizedName("Sushi");
	setTextureName("eancraft:Sushi");
	setMaxStackSize(64);
}

public ItemStack onEaten(ItemStack itemStack, World world, EntityPlayer player) {
	player.addExhaustion(4.0F);
	player.addPotionEffect(new PotionEffect(9, 1, 1));
	player.addPotionEffect(new PotionEffect(5, 2, 1));
	return itemStack;
}
}

 

 

 

On eaten makes.something to food? Good to know...

 

Have you already tried.to us a minecraft item or block? And could you please show me.your mainclass?

Here could be your advertisement!

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ean521 Tree Puncher

ean521

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My Eancraft.class is here:

 

 

package com.gmail.eanwowmaster;

import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.Mod.Instance;
import cpw.mods.fml.common.SidedProxy;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.common.registry.LanguageRegistry;
import cpw.mods.fml.common.registry.EntityRegistry;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Item;
import net.minecraft.item.ItemPickaxe;
import net.minecraft.item.crafting.FurnaceRecipes;
import net.minecraft.item.ItemBlock;
import net.minecraft.block.BlockDirt;
import net.minecraft.entity.EntityList;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraftforge.common.ForgeHooks;
import net.minecraftforge.common.MinecraftForge;

import java.util.Random;

import com.gmail.eanwowmaster.proxy.CommonProxy;

@Mod(modid=Eancraft.MODID, name="Eancraft", version="1.0")
public class Eancraft {

public static Block anvilOre = new AnvilOre(Material.rock);
public static Block eanOre = new EanOre(Material.rock);
public static CreativeTabs eancraftTab = new EancraftTabs(CreativeTabs.getNextID(), "Eancraft");
public static Item anvilSword = new AnvilSword();
public static Item sushi = new Sushi();
static final String MODID = "eancraft";

@Instance(value="EancraftMod")
public static Eancraft instance;

@SidedProxy(clientSide="com.gmail.eanwowmaster.proxy.ClientProxy", serverSide="com.gmail.eanwowmaster.proxy.CommonProxy")
public static CommonProxy proxy;

public static void registerEntity(Class entityClass, String name, int primaryColor, int secondaryColor) {
	int entityID = EntityRegistry.findGlobalUniqueEntityId();
	long seed = name.hashCode();
	EntityRegistry.registerGlobalEntityID(entityClass, name, entityID);
	EntityRegistry.registerModEntity(entityClass,  name, entityID,  instance,  64,  1,  true);
	EntityList.entityEggs.put(Integer.valueOf(entityID), new EntityList.EntityEggInfo(entityID, primaryColor, secondaryColor));
}

public void preInit(FMLPreInitializationEvent evt) {
	GameRegistry.registerBlock(anvilOre, anvilOre.getUnlocalizedName().substring(5));
	GameRegistry.registerBlock(eanOre, eanOre.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(anvilSword, anvilSword.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(sushi, sushi.getUnlocalizedName().substring(5));
	registerEntity(Ean.class, "ean", 5, 17);
	proxy.registerRenderers();
}

public void load(FMLInitializationEvent evt) {
	proxy.registerRenderers();
	ItemStack anvilStack = new ItemStack(Blocks.anvil);
	ItemStack ironStack = new ItemStack(Items.iron_ingot);
	ItemStack anvilSwordStack = new ItemStack(anvilSword);
	ItemStack sushiStack = new ItemStack(sushi);
	ItemStack fishStack = new ItemStack(Items.fish);
	ItemStack leafStack = new ItemStack(Blocks.leaves);

	GameRegistry.addRecipe(anvilSwordStack, "x", "x", "y", 'x', anvilStack, 'y', ironStack);
	GameRegistry.addRecipe(sushiStack, "x", "xyx", "x", 'x', fishStack, 'y', leafStack);
}	

public void postInit(FMLPostInitializationEvent evt) {
}		
}

 

 

I can't tell why it would be null. I mean, just look at this beauty! How could it ever be null?!

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ean521 Tree Puncher

ean521

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Okay, I found this in the console while it was starting up the client; I'm not sure why it can't read the image, though...:

 

 

javax.imageio.IIOException: Can't read input file!

at javax.imageio.ImageIO.read(ImageIO.java:1275) ~[?:1.6.0_45]

at net.minecraft.client.Minecraft.readImage(Minecraft.java:639) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.startGame(Minecraft.java:468) [Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:890) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:112) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.6.0_45]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[?:1.6.0_45]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[?:1.6.0_45]

at java.lang.reflect.Method.invoke(Method.java:597) ~[?:1.6.0_45]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

 

 

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brandon3055 Diamond Finder

brandon3055

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Posted

I can tell you how i have mine set up maby it will help.

 

Use a separate class for your tab mine looks like this:

(change TolkienTab to whatever you want your tab class to be called)

 

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.Item;
import tolkienaddon.items.ModItems;
             
public class TolkienTab extends CreativeTabs {
public TolkienTab(final int id, final String modid) {
	super(id, modid);
}

@Override
public Item getTabIconItem()
{
	return ModItems.tclogo; //if you cant get your custom block/item to work try a vanilla block/item e.g. Items.diamond
}
}

 

And in your main class put:

private static CreativeTabs tolkienTab = new TolkienTab(CreativeTabs.getNextID(), References.MODID);

Then to add something to the tab use:

this.setCreativeTab(Tolkienaddon.getCreativeTab());

note: Tolkienaddon is the name of my main class

 

I am the author of Draconic Evolution

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ean521 Tree Puncher

ean521

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package com.gmail.eanwowmaster;

import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.Mod.Instance;
import cpw.mods.fml.common.SidedProxy;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.common.registry.LanguageRegistry;
import cpw.mods.fml.common.registry.EntityRegistry;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Item;
import net.minecraft.item.ItemPickaxe;
import net.minecraft.item.crafting.FurnaceRecipes;
import net.minecraft.item.ItemBlock;
import net.minecraft.block.BlockDirt;
import net.minecraft.entity.EntityList;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraftforge.common.ForgeHooks;
import net.minecraftforge.common.MinecraftForge;
import java.util.Random;
import com.gmail.eanwowmaster.proxy.CommonProxy;

@Mod(modid=Eancraft.MODID, name="Eancraft", version="1.0")
public class Eancraft {

public static Block anvilOre;
public static Block eanOre;
public static Item anvilSword;
public static Item sushi;
static final String MODID = "eancraft";

@Instance(value="Eancraft")
public static Eancraft instance;

@SidedProxy(clientSide="com.gmail.eanwowmaster.proxy.ClientProxy", serverSide="com.gmail.eanwowmaster.proxy.CommonProxy")
public static CommonProxy proxy;

public static void registerEntity(Class entityClass, String name, int primaryColor, int secondaryColor) {
	int entityID = EntityRegistry.findGlobalUniqueEntityId();
	long seed = name.hashCode();
	EntityRegistry.registerGlobalEntityID(entityClass, name, entityID);
	EntityRegistry.registerModEntity(entityClass,  name, entityID,  instance,  64,  1,  true);
	EntityList.entityEggs.put(Integer.valueOf(entityID), new EntityList.EntityEggInfo(entityID, primaryColor, secondaryColor));
}

public void preInit(FMLPreInitializationEvent evt) {
	anvilOre = new AnvilOre(Material.rock);
        eanOre = new EanOre(Material.rock);
        anvilSword = new AnvilSword();
        sushi = new Sushi();
	GameRegistry.registerBlock(anvilOre, anvilOre.getUnlocalizedName().substring(5));
	GameRegistry.registerBlock(eanOre, eanOre.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(anvilSword, anvilSword.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(sushi, sushi.getUnlocalizedName().substring(5));
	registerEntity(Ean.class, "ean", 5, 17);
	proxy.registerRenderers();
}

public void load(FMLInitializationEvent evt) {
	proxy.registerRenderers();
	ItemStack anvilStack = new ItemStack(Blocks.anvil);
	ItemStack ironStack = new ItemStack(Items.iron_ingot);
	ItemStack anvilSwordStack = new ItemStack(anvilSword);
	ItemStack sushiStack = new ItemStack(sushi);
	ItemStack fishStack = new ItemStack(Items.fish);
	ItemStack leafStack = new ItemStack(Blocks.leaves);

	GameRegistry.addRecipe(anvilSwordStack, "x", "x", "y", 'x', anvilStack, 'y', ironStack);
	GameRegistry.addRecipe(sushiStack, "x", "xyx", "x", 'x', fishStack, 'y', leafStack);
}	

public void postInit(FMLPostInitializationEvent evt) {
}		
}

 

 

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ean521 Tree Puncher

ean521

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That seemed to be the problem... Now I'm getting a NullPointerException at

cpw.mods.fml.common.registry.EntityRegistry.doModEntityRegistration(/*whatever parameters are here*/)

 

It still can't read the file for some reason. I can probably fix the NullPointerException, though.

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darty11 Creeper Killer

darty11

Posted
Posted

I just decided to use the Vanilla tabs for my items, but if you can fix this, please tell me!

 

	public static Block anvilOre = new AnvilOre(Material.rock);
public static Block eanOre = new EanOre(Material.rock);
public static CreativeTabs eancraftTab = new EancraftTabs(CreativeTabs.getNextID(), "Eancraft");

Although EanOre is defined here, it is not registered, and is exactly the same as what you had before.

 

I have no experience with creative tabs, but try this:

public static Block anvilOre;
public static Block eanOre;

 

@EventHandle
public void preInit(FMLPreInitializationEvent evt) {

        eanOre = new EanOre(Material.rock);
        GameRegistry.registerBlock(eanOre, eanOre.getUnlocalizedName().substring(5));
        eancraftTab = new EancraftTabs(CreativeTabs.getNextID(), "Eancraft");
        eanOre.setCreativeTab(eancraftTab);
        anvilOre = new AnvilOre(Material.rock);
        anvilSword = new AnvilSword();
        sushi = new Sushi();
	GameRegistry.registerBlock(anvilOre, anvilOre.getUnlocalizedName().substring(5));

	GameRegistry.registerItem(anvilSword, anvilSword.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(sushi, sushi.getUnlocalizedName().substring(5));
	registerEntity(Ean.class, "ean", 5, 17);
	proxy.registerRenderers();

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