[1.7.10]java.lang.NullPointerException when opening Custom Item GUI

_gjkf_ · July 16, 2014

Hello everyone!!! I'm making a mod that adds 2 items, an helmet that allows the player to listen to the radio while playing and the radio crystal that should go inside the helmet. My goal is to make a GUI for the helmet with only 1 slot that can contain only the radio crystal. I have no clue with GUIs, I looked at Minecraft code in order to do it (the ChestContainer class, the ChestGui). I have no idea where's my problem.

Here's the crash report

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

Time: 16/07/14 15.05
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at cpw.mods.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:263)
at cpw.mods.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:93)
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2514)
at com.gjkf.headPhones.items.HeadPhones.onItemRightClick(HeadPhones.java:36)
at net.minecraft.item.ItemStack.useItemRightClick(ItemStack.java:166)
at net.minecraft.client.multiplayer.PlayerControllerMP.sendUseItem(PlayerControllerMP.java:434)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1556)
at net.minecraft.client.Minecraft.runTick(Minecraft.java:2043)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1038)
at net.minecraft.client.Minecraft.run(Minecraft.java:961)
at net.minecraft.client.main.Main.main(Main.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at GradleStart.bounce(GradleStart.java:95)
at GradleStart.startClient(GradleStart.java:88)
at GradleStart.main(GradleStart.java:56)


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

-- Head --
Stacktrace:
at cpw.mods.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:263)
at cpw.mods.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:93)
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2514)
at com.gjkf.headPhones.items.HeadPhones.onItemRightClick(HeadPhones.java:36)
at net.minecraft.item.ItemStack.useItemRightClick(ItemStack.java:166)
at net.minecraft.client.multiplayer.PlayerControllerMP.sendUseItem(PlayerControllerMP.java:434)
at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1556)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['ForgeDevName'/168, l='MpServer', x=12,68, y=5,54, z=1,66]]
Chunk stats: MultiplayerChunkCache: 360, 360
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options: 
Level spawn location: World: (356,4,-283), Chunk: (at 4,0,5 in 22,-18; contains blocks 352,0,-288 to 367,255,-273), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 5568 game time, 2346 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 1 total; [EntityClientPlayerMP['ForgeDevName'/168, l='MpServer', x=12,68, y=5,54, z=1,66]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:417)
at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2567)
at net.minecraft.client.Minecraft.run(Minecraft.java:990)
at net.minecraft.client.main.Main.main(Main.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at GradleStart.bounce(GradleStart.java:95)
at GradleStart.startClient(GradleStart.java:88)
at GradleStart.main(GradleStart.java:56)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 842866192 bytes (803 MB) / 1056309248 bytes (1007 MB) up to 1056309248 bytes (1007 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.18.1180 Minecraft Forge 10.13.0.1180 4 mods loaded, 4 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.18.1180} [Forge Mod Loader] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.0.1180} [Minecraft Forge] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
HeadPhonesRadio{0.1} [HeadPhonesRadio] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.7.10
LWJGL: 2.9.1
OpenGL: NVIDIA GeForce 9400M OpenGL Engine GL version 2.1 NVIDIA-7.32.12, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Here's my Main class

package com.gjkf.headPhones;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemArmor.ArmorMaterial;
import net.minecraft.item.ItemStack;
import net.minecraftforge.common.util.EnumHelper;

import com.gjkf.headPhones.creativeTab.HeadPhonesCreativeTab;
import com.gjkf.headPhones.handler.ConfigurationHandler;
import com.gjkf.headPhones.items.HeadPhones;
import com.gjkf.headPhones.items.RadioCrystal;
import com.gjkf.headPhones.proxy.CommonProxy;
import com.gjkf.headPhones.reference.References;
import com.gjkf.headPhones.utility.LogHelper;

import cpw.mods.fml.common.FMLCommonHandler;
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.network.NetworkRegistry;
import cpw.mods.fml.common.registry.GameRegistry;

@Mod(modid = References.MODID, name = References.MOD_NAME,version = References.VERSION, guiFactory = References.GUI_FACTORY_CLASS)
public class Main {

@Instance(References.MODID)
public static Main instance;

@SidedProxy(clientSide = References.CLIENT_PROXY_CLASS, serverSide = References.SERVER_PROXY_CLASS)
public static CommonProxy proxy;

public static int headPhonesId;

public static CreativeTabs tab = new HeadPhonesCreativeTab(CreativeTabs.getNextID(), "HeadPhonesTab");

public static ArmorMaterial plastic = new EnumHelper().addArmorMaterial("plastic", 100, new int[]{1,0,0,0}, 0);

public static Item headPhones = new HeadPhones(plastic, headPhonesId, 0).setUnlocalizedName("headPhones")
		.setCreativeTab(tab);

public static Item radioCrystal = new RadioCrystal().setUnlocalizedName("radioCrystal").setCreativeTab(tab);

@EventHandler
public void preinit(FMLPreInitializationEvent event){

	ConfigurationHandler.init(event.getSuggestedConfigurationFile());
	FMLCommonHandler.instance().bus().register(new ConfigurationHandler());

	GameRegistry.registerItem(headPhones, "headPhones");

	GameRegistry.registerItem(radioCrystal, "radioCrystal");

	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_11);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_13);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_cat);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_chirp);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_far);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_mall);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_mellohi);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_stal);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_strad);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_wait);
	GameRegistry.addRecipe(new ItemStack(headPhones), "xxx","xax",'x', Blocks.log, 'a', Items.record_ward);

	LogHelper.info("Pre Initialization Complete!!!");
}

@EventHandler
    public void init(FMLInitializationEvent event){

	NetworkRegistry.INSTANCE.registerGuiHandler(this, new CommonProxy());

	LogHelper.info("Initialization Complete!!!");
}

@EventHandler
public void postinit(FMLPostInitializationEvent event){

	LogHelper.info("Post Initialization Complete!!!");
}

}

Here's my Helmet class

package com.gjkf.headPhones.items;

import net.minecraft.client.Minecraft;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemArmor;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

import com.gjkf.headPhones.Main;
import com.gjkf.headPhones.client.gui.HeadPhonesGui;
import com.gjkf.headPhones.reference.References;
import com.gjkf.headPhones.utility.LogHelper;

public class HeadPhones extends ItemArmor{

public HeadPhonesContainer container;

public HeadPhones(ArmorMaterial material, int id, int placement) {
	super(material, id, placement);

	if(placement == 0){
		this.setTextureName(References.MODID+":headPhones");
	}
}

@Override
public String getArmorTexture(ItemStack  stack, Entity entity, int slot, String type){
	if(stack.getItem() == Main.headPhones){
		return References.MODID+":textures/models/armor/headPhonesArmor_1.png";
	}else{
		return null;
	}
}

@Override
public ItemStack onItemRightClick(ItemStack stack, World world, EntityPlayer player){
	if (player.isSneaking()){
		player.openGui(HeadPhonesGui.class, References.GUI_ID, world, (int)player.serverPosX, (int)player.serverPosY, (int)player.serverPosZ);
		LogHelper.info("Succesfully opened GUI");
	}

	return stack;
}

}

Here's my Helmet Container class

package com.gjkf.headPhones.items;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

public class HeadPhonesContainer extends Container{

private IInventory playerInv;
private int numSlots = 1;

public HeadPhonesContainer(IInventory inv1, IInventory inv2){
	this.playerInv = inv1;

	for (int j = 0; j < this.numSlots; ++j)
        {
            for (int k = 0; k < 1; ++k)
            {
                this.addSlotToContainer(new Slot(inv2, k + j * 9, 8 + k * 18, 18 + j * 18));
            }
        }
}

@Override
public ItemStack transferStackInSlot(EntityPlayer p_82846_1_, int p_82846_2_){
     return null;
    }

@Override
public boolean canInteractWith(EntityPlayer player){
	return this.playerInv.isUseableByPlayer(player);
}

@Override
 public void onContainerClosed(EntityPlayer p_75134_1_){
        super.onContainerClosed(p_75134_1_);
        this.playerInv.closeInventory();
    }

}

Here's my Helmet GUI class

package com.gjkf.headPhones.client.gui;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.resources.I18n;
import net.minecraft.inventory.IInventory;
import net.minecraft.util.ResourceLocation;

import org.lwjgl.opengl.GL11;

import com.gjkf.headPhones.items.HeadPhonesContainer;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class HeadPhonesGui extends GuiContainer{

private static final ResourceLocation location = new ResourceLocation("textures/gui/headPhonesGui.png");
public static IInventory headPhones;
private IInventory playerInv;
private int inventoryRows;

public HeadPhonesGui(IInventory inv1, IInventory inv2) {
	super(new HeadPhonesContainer(inv1, inv2));
	this.headPhones = inv1;
	this.playerInv = inv2;
}

@Override
protected void drawGuiContainerBackgroundLayer(float p_146976_1_, int p_146976_2_, int p_146976_3_) {
	this.fontRendererObj.drawString(this.playerInv.hasCustomInventoryName() ? this.playerInv.getInventoryName() : I18n.format(this.playerInv.getInventoryName(), new Object[0]), 8, 6, 4210752);
        this.fontRendererObj.drawString(this.headPhones.hasCustomInventoryName() ? this.headPhones.getInventoryName() : I18n.format(this.headPhones.getInventoryName(), new Object[0]), 8, this.ySize - 96 + 2, 4210752);
}

protected void drawGuiContainerBackgroundLayer1(float p_146976_1_, int p_146976_2_, int p_146976_3_)
    {
        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
        this.mc.getTextureManager().bindTexture(location);
        int k = (this.width - this.xSize) / 2;
        int l = (this.height - this.ySize) / 2;
        this.drawTexturedModalRect(k, l, 0, 0, this.xSize, this.inventoryRows * 18 + 17);
        this.drawTexturedModalRect(k, l + this.inventoryRows * 18 + 17, 0, 126, this.xSize, 96);
    }

}

Here's my Common Proxy

package com.gjkf.headPhones.proxy;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.world.World;

import com.gjkf.headPhones.client.gui.HeadPhonesGui;
import com.gjkf.headPhones.items.HeadPhonesContainer;
import com.gjkf.headPhones.reference.References;

import cpw.mods.fml.common.network.IGuiHandler;

public class CommonProxy implements IGuiHandler{

@Override
public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	return null;
}

@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {

	if (ID == References.GUI_ID){
		return new HeadPhonesGui(player.inventory, HeadPhonesGui.headPhones);
	}
	return null;
}

}

Here's my Reference class

package com.gjkf.headPhones.reference;

public class References {

public static final String MODID = "HeadPhonesRadio";
public static final String MOD_NAME = "HeadPhones Radio Mod";
public static final String VERSION = "0.1";
public static final String GUI_FACTORY_CLASS = "com.gjkf.headPhones.client.gui.GuiFactory";
public static final String CLIENT_PROXY_CLASS = "com.gjkf.headPhones.proxy.ClientProxy";
public static final String SERVER_PROXY_CLASS = "com.gjkf.headPhones.proxy.ServerProxy";
public static final String COMMON_PROXY_CLASS = "com.gjkf.headPhones.proxy.CommonProxy";
public static final int GUI_ID = 1000;
}

Again, I'm really new to GUIs so I could have made incredible mistakes, please don't yell me.

Thanks for all the help.

FLUFFY2 · July 16, 2014

Try it like so:

.openGui(Main.instance, yourGuiID, par2World, (int)player.posX, (int)player.posY, (int)player.posZ);

Also not use serverPos for gui.

Hope its working now.

_gjkf_ · July 16, 2014

Thanks for the early reply.

Now it kinda is working. I still crash but for another reason.

Here's the report

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 16/07/14 17.58
Description: Rendering screen

java.lang.NullPointerException: Rendering screen
at com.gjkf.headPhones.client.gui.HeadPhonesGui.drawGuiContainerBackgroundLayer(HeadPhonesGui.java:31)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:97)
at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:1145)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1066)
at net.minecraft.client.Minecraft.run(Minecraft.java:961)
at net.minecraft.client.main.Main.main(Main.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at GradleStart.bounce(GradleStart.java:95)
at GradleStart.startClient(GradleStart.java:88)
at GradleStart.main(GradleStart.java:56)


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

-- Head --
Stacktrace:
at com.gjkf.headPhones.client.gui.HeadPhonesGui.drawGuiContainerBackgroundLayer(HeadPhonesGui.java:31)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:97)

-- Screen render details --
Details:
Screen name: com.gjkf.headPhones.client.gui.HeadPhonesGui
Mouse location: Scaled: (273, 213). Absolute: (546, 52)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['ForgeDevName'/106, l='MpServer', x=708,58, y=5,59, z=1059,00]]
Chunk stats: MultiplayerChunkCache: 210, 210
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options: 
Level spawn location: World: (720,4,1047), Chunk: (at 0,0,7 in 45,65; contains blocks 720,0,1040 to 735,255,1055), Region: (1,2; contains chunks 32,64 to 63,95, blocks 512,0,1024 to 1023,255,1535)
Level time: 1850 game time, 1850 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 60 total; [EntityChicken['Chicken'/3, l='MpServer', x=632,66, y=4,00, z=989,44], EntityChicken['Chicken'/5, l='MpServer', x=639,66, y=4,00, z=985,56], EntityChicken['Chicken'/6, l='MpServer', x=637,56, y=4,00, z=1069,53], EntityChicken['Chicken'/7, l='MpServer', x=638,50, y=4,00, z=1072,50], EntityChicken['Chicken'/8, l='MpServer', x=638,59, y=4,00, z=1077,44], EntityPig['Pig'/21, l='MpServer', x=644,50, y=4,00, z=985,50], EntityChicken['Chicken'/23, l='MpServer', x=641,50, y=4,00, z=988,50], EntityPig['Pig'/22, l='MpServer', x=640,94, y=4,00, z=984,56], EntityChicken['Chicken'/24, l='MpServer', x=640,50, y=4,00, z=986,50], EntityChicken['Chicken'/27, l='MpServer', x=640,63, y=4,00, z=1067,63], EntityChicken['Chicken'/26, l='MpServer', x=639,81, y=4,00, z=1068,78], EntityChicken['Chicken'/29, l='MpServer', x=651,57, y=4,00, z=1072,44], EntityChicken['Chicken'/28, l='MpServer', x=654,41, y=4,00, z=1067,56], EntitySheep['Sheep'/31, l='MpServer', x=652,16, y=4,00, z=1126,78], EntityChicken['Chicken'/30, l='MpServer', x=640,47, y=4,00, z=1073,47], EntityCow['Cow'/34, l='MpServer', x=659,22, y=4,00, z=1135,22], EntityChicken['Chicken'/33, l='MpServer', x=658,44, y=4,00, z=1059,56], EntityCow['Cow'/38, l='MpServer', x=657,34, y=4,00, z=1139,09], EntityCow['Cow'/42, l='MpServer', x=680,94, y=4,00, z=1015,19], EntityChicken['Chicken'/43, l='MpServer', x=686,53, y=4,00, z=1018,56], EntityCow['Cow'/46, l='MpServer', x=679,51, y=4,00, z=1026,43], EntityCow['Cow'/47, l='MpServer', x=682,13, y=4,00, z=1028,09], EntityChicken['Chicken'/44, l='MpServer', x=676,63, y=4,00, z=1036,44], EntitySheep['Sheep'/45, l='MpServer', x=684,50, y=4,00, z=1031,97], EntityChicken['Chicken'/51, l='MpServer', x=685,38, y=4,00, z=1076,44], EntitySheep['Sheep'/50, l='MpServer', x=678,34, y=4,00, z=1078,50], EntitySheep['Sheep'/49, l='MpServer', x=679,84, y=4,00, z=1079,88], EntitySheep['Sheep'/48, l='MpServer', x=680,72, y=4,00, z=1067,38], EntityChicken['Chicken'/54, l='MpServer', x=684,41, y=4,00, z=1092,44], EntityChicken['Chicken'/53, l='MpServer', x=676,72, y=4,00, z=1074,28], EntityChicken['Chicken'/52, l='MpServer', x=679,81, y=4,00, z=1077,34], EntitySheep['Sheep'/59, l='MpServer', x=696,41, y=4,00, z=1064,19], EntityChicken['Chicken'/58, l='MpServer', x=688,06, y=4,00, z=1028,19], EntitySheep['Sheep'/57, l='MpServer', x=697,19, y=4,00, z=1029,22], EntityClientPlayerMP['ForgeDevName'/106, l='MpServer', x=708,58, y=5,59, z=1059,00], EntitySheep['Sheep'/62, l='MpServer', x=717,25, y=4,00, z=1131,63], EntityCow['Cow'/61, l='MpServer', x=715,88, y=4,00, z=1126,13], EntitySheep['Sheep'/60, l='MpServer', x=708,94, y=4,00, z=1031,94], EntitySheep['Sheep'/68, l='MpServer', x=732,16, y=4,00, z=1125,16], EntitySheep['Sheep'/69, l='MpServer', x=728,50, y=4,00, z=1132,50], EntitySheep['Sheep'/70, l='MpServer', x=732,59, y=4,00, z=1132,72], EntitySheep['Sheep'/71, l='MpServer', x=734,63, y=4,00, z=1135,50], EntityCow['Cow'/76, l='MpServer', x=730,91, y=4,00, z=1128,19], EntityCow['Cow'/77, l='MpServer', x=735,50, y=4,00, z=1132,50], EntitySheep['Sheep'/72, l='MpServer', x=733,78, y=4,00, z=1134,38], EntitySheep['Sheep'/73, l='MpServer', x=733,50, y=4,00, z=1127,50], EntitySheep['Sheep'/74, l='MpServer', x=734,50, y=4,00, z=1129,50], EntityCow['Cow'/75, l='MpServer', x=729,50, y=4,00, z=1126,50], EntitySheep['Sheep'/85, l='MpServer', x=748,25, y=4,00, z=1077,63], EntityPig['Pig'/87, l='MpServer', x=758,47, y=4,00, z=1069,31], EntitySheep['Sheep'/86, l='MpServer', x=762,50, y=4,00, z=1071,50], EntitySheep['Sheep'/93, l='MpServer', x=764,50, y=4,00, z=1072,22], EntitySheep['Sheep'/92, l='MpServer', x=767,91, y=4,00, z=1062,94], EntitySheep['Sheep'/95, l='MpServer', x=759,63, y=4,00, z=1080,81], EntitySheep['Sheep'/94, l='MpServer', x=755,19, y=4,00, z=1083,19], EntityPig['Pig'/89, l='MpServer', x=754,55, y=4,00, z=1063,92], EntityPig['Pig'/88, l='MpServer', x=755,91, y=4,00, z=1064,49], EntitySheep['Sheep'/91, l='MpServer', x=764,81, y=4,00, z=1070,28], EntityPig['Pig'/90, l='MpServer', x=753,19, y=4,00, z=1065,81], EntitySheep['Sheep'/96, l='MpServer', x=770,81, y=4,00, z=1074,34]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:417)
at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2567)
at net.minecraft.client.Minecraft.run(Minecraft.java:983)
at net.minecraft.client.main.Main.main(Main.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at GradleStart.bounce(GradleStart.java:95)
at GradleStart.startClient(GradleStart.java:88)
at GradleStart.main(GradleStart.java:56)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 851198632 bytes (811 MB) / 1056309248 bytes (1007 MB) up to 1056309248 bytes (1007 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.18.1180 Minecraft Forge 10.13.0.1180 4 mods loaded, 4 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.10.18.1180} [Forge Mod Loader] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.13.0.1180} [Minecraft Forge] (forgeSrc-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
HeadPhonesRadio{0.1} [HeadPhonesRadio] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.7.10
LWJGL: 2.9.1
OpenGL: NVIDIA GeForce 9400M OpenGL Engine GL version 2.1 NVIDIA-7.32.12, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Thanks again

_gjkf_ · July 16, 2014

Do you mean like this?

public HeadPhonesGui(IInventory inv1, IInventory inv2) {
	super(new HeadPhonesContainer(inv1, null));
	this.headPhones = inv1;
}

If so, it still crashes at the exact same point.

If you mean this

public HeadPhonesGui(IInventory inv1, IInventory inv2) {
	super(new HeadPhonesContainer(inv1, inv2), null);
	this.headPhones = inv1;
}

It won't work because GuiContainer accepts only 1 argument

I might have not understand you, sorry if that's the case

_gjkf_ · July 16, 2014

Even with that set as null I still crash

@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {

	if (ID == References.GUI_ID){
		return new HeadPhonesGui(player.inventory, null);
	}
	return null;
}

Is it what you meant or did I misunderstand you again?

Sorry, I'm really a noob at this, sorry again

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[1.7.10]java.lang.NullPointerException when opening Custom Item GUI

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