[1.8] Opening GUI displays error on console

[Cerandior]

I just started creating a Tile-Entity which will act as a charger for some items and i am having problems with the gui. I just set-up the GUI Handler the Gui Container, Gui Class. I copied some of the code for the methods of the inventory at Tile Entity from the official Forge Tutorials. Now, don't think that i copied the code because i don't know how to do it on my own, it's just because i am a little bit lazy. I understand every part of the code that i copied and i am certain that i could have created it on my own, so please don't hate on me copying some code.

Let's get to the problem now. When i right click the block. The GUI displays and everything works, but i am concerned by a problem. The console displays some error messages:

 

 

[19:40:30] [server thread/FATAL] [FML]: Exception caught executing FutureTask: java.util.concurrent.ExecutionException: java.lang.NullPointerException

java.util.concurrent.ExecutionException: java.lang.NullPointerException

at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_66]

at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_66]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:715) [FMLCommonHandler.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:727) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540) [MinecraftServer.class:?]

at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]

Caused by: java.lang.NullPointerException

at net.minecraft.network.NetHandlerPlayServer.processPlayerBlockPlacement(NetHandlerPlayServer.java:654) ~[NetHandlerPlayServer.class:?]

at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.processPacket(C08PacketPlayerBlockPlacement.java:67) ~[C08PacketPlayerBlockPlacement.class:?]

at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.processPacket(C08PacketPlayerBlockPlacement.java:114) ~[C08PacketPlayerBlockPlacement.class:?]

at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:24) ~[PacketThreadUtil$1.class:?]

at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_66]

at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_66]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:714) ~[FMLCommonHandler.class:?]

... 5 more

 

 

Very weird problem. It has never happen to me before. These are the classes which i think are causing the problem: (If you need more info i will update this post)

 

Main Class:

 

 

package com.ae.main;


import org.lwjgl.util.glu.GLU;
import org.lwjgl.util.glu.Sphere;

import com.ae.GUI.GuiHandler;
import com.ae.blocks.Charger;
import com.ae.client.ItemRenderer;
import com.ae.editv.BehaviorMelonDispenseItem;
import com.ae.editv.BehaviorPumpkinDispenseItem;
import com.ae.editv.BehaviorSeedDispenseItem;
import com.ae.proxies.proxylib;
import com.ae.tools.flintAxe;
import com.ae.tools.flintHoe;
import com.ae.tools.flintPickaxe;
import com.ae.tools.flintShovel;
import com.ae.tools.flintSword;
import com.ae.tools.BaseClasses.BaseTool;
import com.ae.tools.energyTool;

import net.minecraft.block.Block;
import net.minecraft.block.BlockDispenser;
import net.minecraft.client.Minecraft;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.dispenser.BehaviorDefaultDispenseItem;
import net.minecraft.enchantment.Enchantment;
import net.minecraft.enchantment.EnchantmentData;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemAxe;
import net.minecraft.item.ItemEnchantedBook;
import net.minecraft.item.ItemHoe;
import net.minecraft.item.ItemPickaxe;
import net.minecraft.item.ItemSpade;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemSword;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.common.util.EnumHelper;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.Mod.Instance;
import net.minecraftforge.fml.common.SidedProxy;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.network.NetworkRegistry;
import net.minecraftforge.fml.common.registry.EntityRegistry;
import net.minecraftforge.fml.common.registry.GameRegistry;

@Mod(modid = AdvancedElectronics.MODID, name = AdvancedElectronics.NAME, version = AdvancedElectronics.VERSION)

public class AdvancedElectronics {

public static final String MODID = "ae";
public static final String NAME = "AdvancedElectronics";
public static final String VERSION = "1.0";

@Instance
public static AdvancedElectronics instance;

@SidedProxy(clientSide = proxylib.CLIENTSIDE, serverSide = proxylib.SERVERSIDE)

public static serverProxy proxy;

public static int ChargerGUIID = 0;

//Creative Tab
public static CreativeTabs aeTab = new aeTab(CreativeTabs.getNextID(), "Advanced Electronics");

//Armor Material

//Tool Material
public static Item.ToolMaterial flintMat = EnumHelper.addToolMaterial("flintMat", 1, 160, 5.0F, 1.5F, 10);

//Items

public static Item testItem;

/**
 * To add:
 * New tools to help the player have a better beginning of the game (Done !)
 * New ores, (probably different metals or non-metals (To do)
 * New redstone machines (To Do)
 * New energy system (probably a redstone liquid) (To Do)
 * New power machines (To Do)
 * New energy tools (To Do)
 * New energy armor (To Do)
 * Possibly a book with all the mod contents (To Do)
 * --------------------------------------------------------- Soon when i get more ideas
 */


//Blocks
public static Block Charger;

//Tools
public static ItemAxe flintAxe;
public static ItemSword flintSword;
public static ItemSpade flintShovel;
public static ItemPickaxe flintPickaxe;
public static ItemHoe flintHoe;

public static Item energyTool;


//Misc

@EventHandler
public void preInit(FMLPreInitializationEvent event) {

	//Items


	//Blocks
	Charger = new Charger();

	//Tools

	flintAxe = new flintAxe();
	flintSword = new flintSword();
	flintShovel = new flintShovel();
	flintPickaxe = new flintPickaxe();
	flintHoe = new flintHoe();

	energyTool = new energyTool();

	//Machine

	//Misc

	//Registering Items

	//Registering TE

	//Registering Blocks
	GameRegistry.registerBlock(Charger, Charger.getUnlocalizedName().substring(5));		

	//Registering Tools
	GameRegistry.registerItem(flintAxe, flintAxe.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(flintSword, flintSword.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(flintShovel, flintShovel.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(flintPickaxe, flintPickaxe.getUnlocalizedName().substring(5));
	GameRegistry.registerItem(flintHoe, flintHoe.getUnlocalizedName().substring(5));

	GameRegistry.registerItem(energyTool, energyTool.getUnlocalizedName().substring(5));


	//Registering Misc
}

@EventHandler
public void Init(FMLInitializationEvent event) {

	proxy.registerRenderInfo();
	NetworkRegistry.INSTANCE.registerGuiHandler(this.instance, new GuiHandler());

}

@EventHandler
public void postInit(FMLPostInitializationEvent event) {

	BlockDispenser.dispenseBehaviorRegistry.putObject(Items.wheat_seeds, new BehaviorSeedDispenseItem());
	BlockDispenser.dispenseBehaviorRegistry.putObject(Items.pumpkin_seeds, new BehaviorPumpkinDispenseItem());
	BlockDispenser.dispenseBehaviorRegistry.putObject(Items.melon_seeds, new BehaviorMelonDispenseItem());

}

}

 

 

My Block Class:

 

 

package com.ae.blocks;

import com.ae.TileEntities.ChargerTE;
import com.ae.main.AdvancedElectronics;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.network.internal.FMLNetworkHandler;

public class Charger extends Block {

public Charger() {
	super(Material.iron);
	this.setUnlocalizedName("Charger");
	this.setCreativeTab(AdvancedElectronics.aeTab);
}

@Override
public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn,
		EnumFacing side, float hitX, float hitY, float hitZ) {

	int x = pos.getX();
	int y = pos.getY();
	int z = pos.getZ();

	TileEntity TE = worldIn.getTileEntity(pos);
	if(!playerIn.isSneaking()){
		playerIn.openGui(AdvancedElectronics.instance, AdvancedElectronics.ChargerGUIID, worldIn, x, y, z);
	}


	return super.onBlockActivated(worldIn, pos, state, playerIn, side, hitX, hitY, hitZ);
}

@Override
public TileEntity createTileEntity(World world, IBlockState state) {
	return new ChargerTE();
}

}

 

 

Tile Entity Class: (Extends a base class which holds the energy value and such)

 

 

package com.ae.TileEntities;

import com.ae.TileEntities.BaseClasses.EnergyChargerTE;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.IChatComponent;

public class ChargerTE extends EnergyChargerTE implements ISidedInventory{

private ItemStack inv[];

public ChargerTE(){
	inv = new ItemStack[4];
}

@Override
public void writeToNBT(NBTTagCompound nbt) {

        NBTTagList itemList = new NBTTagList();
        for (int i = 0; i < inv.length; i++) {
                ItemStack stack = inv[i];
                if (stack != null) {
                        NBTTagCompound tag = new NBTTagCompound();
                        tag.setByte("Slot", (byte) i);
                        stack.writeToNBT(tag);
                        itemList.appendTag(tag);
                }
        }
        nbt.setTag("Inventory", itemList);

	super.writeToNBT(nbt);
}

@Override
public void readFromNBT(NBTTagCompound nbt) {

	 NBTTagList tagList = nbt.getTagList("Inventory", 10);
         for (int i = 0; i < tagList.tagCount(); i++) {
                 NBTTagCompound tag = (NBTTagCompound) tagList.getCompoundTagAt(i);
                 byte slot = tag.getByte("Slot");
                 if (slot >= 0 && slot < inv.length) {
                         inv[slot] = ItemStack.loadItemStackFromNBT(tag);
                 }
         }

	super.readFromNBT(nbt);
}

@Override
public int getSizeInventory() {
	return inv.length;
}

@Override
public ItemStack getStackInSlot(int index) {
	return inv[index];
}

@Override
public ItemStack decrStackSize(int index, int count) {

	ItemStack stack = getStackInSlot(index);
        if (stack != null) {
                if (stack.stackSize <= count) {
                        setInventorySlotContents(index, null);
                } else {
                        stack = stack.splitStack(count);
                        if (stack.stackSize == 0) {
                                setInventorySlotContents(index, null);
                        }
                }
        }
	return stack;
}

@Override
public ItemStack getStackInSlotOnClosing(int index) {
	  
	  ItemStack stack = getStackInSlot(index);
          if (stack != null) {
                  setInventorySlotContents(index, null);
          }
          return stack;
}

@Override
public void setInventorySlotContents(int index, ItemStack stack) {

	inv[index] = stack;
        if (stack != null && stack.stackSize > getInventoryStackLimit()) {
                stack.stackSize = getInventoryStackLimit();
        }
        
}

@Override
public int getInventoryStackLimit() {
	return 1;
}

@Override
public boolean isUseableByPlayer(EntityPlayer player) {
	return true;
}

@Override
public void openInventory(EntityPlayer player) {
}

@Override
public void closeInventory(EntityPlayer player) {
}

@Override
public boolean isItemValidForSlot(int index, ItemStack stack) {
	return true;
}

@Override
public int getField(int id) {
	return 0;
}

@Override
public void setField(int id, int value) {		
}

@Override
public int getFieldCount() {
	return 0;
}

@Override
public void clear() {		
}

@Override
public String getName() {
	return "Charger Inventory";
}

@Override
public boolean hasCustomName() {
	return true;
}

@Override
public IChatComponent getDisplayName() {
    return null;
}

@Override
public int[] getSlotsForFace(EnumFacing side) {
	return null;
}

@Override
public boolean canInsertItem(int index, ItemStack itemStackIn, EnumFacing direction) {
	return false;
}

@Override
public boolean canExtractItem(int index, ItemStack stack, EnumFacing direction) {
	return false;
}

}

 

 

Gui Handler:

 

 

package com.ae.GUI;

import com.ae.TileEntities.BaseClasses.EnergyChargerTE;
import com.ae.main.AdvancedElectronics;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.BlockPos;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.network.IGuiHandler;

public class GuiHandler implements IGuiHandler{

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

	BlockPos pos = new BlockPos(x, y, z);
	TileEntity te = world.getTileEntity(pos);
	if(ID == AdvancedElectronics.ChargerGUIID){
		return new ContainerCharger(player.inventory, (EnergyChargerTE)te);
	}

         return null;
}

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

	BlockPos pos = new BlockPos(x, y, z);
	TileEntity te = world.getTileEntity(pos);
	if(ID == AdvancedElectronics.ChargerGUIID){
		return new GuiCharger(player.inventory, (EnergyChargerTE)te);
	}

	return null;
}

}

 

 

Container:

 

 

package com.ae.GUI;

import com.ae.TileEntities.BaseClasses.EnergyChargerTE;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;

public class ContainerCharger extends Container{

public ContainerCharger(InventoryPlayer inventory, EnergyChargerTE te) {

}

@Override
public boolean canInteractWith(EntityPlayer playerIn) {
	return true;
}

}

 

 

Gui Class:

 

 

package com.ae.GUI;

import com.ae.TileEntities.BaseClasses.EnergyChargerTE;
import com.ae.main.AdvancedElectronics;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.util.ResourceLocation;

public class GuiCharger extends GuiContainer{

private IInventory playerInv;
private EnergyChargerTE te;
private ResourceLocation texture = new ResourceLocation(AdvancedElectronics.MODID + ":textures/gui/charger.png");

public GuiCharger(InventoryPlayer inventory, EnergyChargerTE te) {
	super(new ContainerCharger(inventory, te));

    this.playerInv = inventory;
    this.te = te;

    this.xSize = 176;
    this.ySize = 166;

}

@Override
protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {

	super.drawGuiContainerForegroundLayer(mouseX, mouseY);
}

@Override
protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {

	GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
	this.mc.getTextureManager().bindTexture(texture);
	this.drawTexturedModalRect(this.guiLeft, this.guiTop, 0, 0, this.xSize, this.ySize);

}

}

 

 

I know that there's a lot of classes there, but i am worried that this problem will cause bigger problems later. If any of you have the patience to look through everything and give me an answer, i will greatly appreciate it. Thank you for the time

 

UPDATE: I just tried to add slots to the container and now the game crashes with another NullPointerException which i believe comes from the last error.

[Cerandior]

I mostly want to know if this is a problem of the build version of forge that i am running or i completely messed up. If it's a forge build problem then i have to upgrade right now. And it might be since it's been some time since i have created this project. However i don't want to make wrong statements, by saying that this is a forge problem. By any means i am not expert at this and i am requiring the help of some who know more about the programming language and Forge as a project in general.

[Choonster]

Put a breakpoint on the line that the exception is thrown from (line 654 of

NetHandlerPlayServer

) and run Minecraft in debug mode. When the breakpoint is hit, look at what's

null

and having a method called on it or a field access from it.

[Cerandior]

This is what's written in line 654 of NetHandlerPlayServer:

 

this.sendPacket(new S2FPacketSetSlot(this.playerEntity.openContainer.windowId, slot.slotNumber, this.playerEntity.inventory.getCurrentItem()));

 

This is what the debugger says:

 

 

And this is the method in which the line 654 takes part in:

 

 

    /**
     * Processes block placement and block activation (anvil, furnace, etc.)
     */
    public void processPlayerBlockPlacement(C08PacketPlayerBlockPlacement packetIn)
    {
        PacketThreadUtil.checkThreadAndEnqueue(packetIn, this, this.playerEntity.getServerForPlayer());
        WorldServer worldserver = this.serverController.worldServerForDimension(this.playerEntity.dimension);
        ItemStack itemstack = this.playerEntity.inventory.getCurrentItem();
        boolean flag = false;
        boolean placeResult = true;
        BlockPos blockpos = packetIn.getPosition();
        EnumFacing enumfacing = EnumFacing.getFront(packetIn.getPlacedBlockDirection());
        this.playerEntity.markPlayerActive();

        if (packetIn.getPlacedBlockDirection() == 255)
        {
            if (itemstack == null)
            {
                return;
            }

            PlayerInteractEvent event = ForgeEventFactory.onPlayerInteract(playerEntity, PlayerInteractEvent.Action.RIGHT_CLICK_AIR, worldserver, new BlockPos(0, 0, 0), null);
            if (event.useItem != Event.Result.DENY)
            {
            this.playerEntity.theItemInWorldManager.tryUseItem(this.playerEntity, worldserver, itemstack);
            }
        }
        else if (blockpos.getY() >= this.serverController.getBuildLimit() - 1 && (enumfacing == EnumFacing.UP || blockpos.getY() >= this.serverController.getBuildLimit()))
        {
            ChatComponentTranslation chatcomponenttranslation = new ChatComponentTranslation("build.tooHigh", new Object[] {Integer.valueOf(this.serverController.getBuildLimit())});
            chatcomponenttranslation.getChatStyle().setColor(EnumChatFormatting.RED);
            this.playerEntity.playerNetServerHandler.sendPacket(new S02PacketChat(chatcomponenttranslation));
            flag = true;
        }
        else
        {
            double dist = playerEntity.theItemInWorldManager.getBlockReachDistance() + 1;
            dist *= dist;
            if (this.hasMoved && this.playerEntity.getDistanceSq((double)blockpos.getX() + 0.5D, (double)blockpos.getY() + 0.5D, (double)blockpos.getZ() + 0.5D) < dist && !this.serverController.isBlockProtected(worldserver, blockpos, this.playerEntity) && worldserver.getWorldBorder().contains(blockpos))
            {
                // record block place result so we can update client itemstack size if place event was cancelled.
                placeResult = this.playerEntity.theItemInWorldManager.activateBlockOrUseItem(this.playerEntity, worldserver, itemstack, blockpos, enumfacing, packetIn.getPlacedBlockOffsetX(), packetIn.getPlacedBlockOffsetY(), packetIn.getPlacedBlockOffsetZ());
            }

            flag = true;
        }

        if (flag)
        {
            this.playerEntity.playerNetServerHandler.sendPacket(new S23PacketBlockChange(worldserver, blockpos));
            this.playerEntity.playerNetServerHandler.sendPacket(new S23PacketBlockChange(worldserver, blockpos.offset(enumfacing)));
        }

        itemstack = this.playerEntity.inventory.getCurrentItem();

        if (itemstack != null && itemstack.stackSize == 0)
        {
            this.playerEntity.inventory.mainInventory[this.playerEntity.inventory.currentItem] = null;
            itemstack = null;
        }

        if (itemstack == null || itemstack.getMaxItemUseDuration() == 0)
        {
            this.playerEntity.isChangingQuantityOnly = true;
            this.playerEntity.inventory.mainInventory[this.playerEntity.inventory.currentItem] = ItemStack.copyItemStack(this.playerEntity.inventory.mainInventory[this.playerEntity.inventory.currentItem]);
            Slot slot = this.playerEntity.openContainer.getSlotFromInventory(this.playerEntity.inventory, this.playerEntity.inventory.currentItem);
            this.playerEntity.openContainer.detectAndSendChanges();
            this.playerEntity.isChangingQuantityOnly = false;

            if (!ItemStack.areItemStacksEqual(this.playerEntity.inventory.getCurrentItem(), packetIn.getStack()) || !placeResult) // force client itemstack update if place event was cancelled
            {
                this.sendPacket(new S2FPacketSetSlot(this.playerEntity.openContainer.windowId, slot.slotNumber, this.playerEntity.inventory.getCurrentItem()));
            }
        }
    }

 

[Choonster]

I'm not familiar with Eclipse's debugger. Does it not show the values of all current variables somewhere? Does it tell you the value of a variable if you mouseover it?

 

IntelliJ IDEA's debugger looks like this:

[Cerandior]

Yes hovering over different variables does bring up soma values. The only value that it's null at the C08PacketPlayerBlockPlacement is the stack.

[Choonster]

I don't understand what you mean, sorry.

 

The only values that could cause this crash are

this.playerEntity

,

this.playerEntity.openContainer

,

slot

and

this.playerEntity.inventory

. Which of these is

null

?

[Cerandior]

None of them. I rechecked again. I had forgotten to register my tile entities. Even after i did. The console displays the same message but now i am able to add slots to the gui.

[Choonster]

So it's definitely still throwing a

NullPointerException

on line 654 of

NetHandlerPlayServer

? Does this happen directly after resuming from the breakpoint on this line when none of the values are

null

?

[Cerandior]

Sorry for the long response. I was at school. When i returned there was a problem with my building's electric system, so they had to work for about an hour. I just opened eclipse and ran the debugger again. I no longer get that error now ( for some reason ). I can add slots that belong to the player inventory. But when i try to add slots to my tile entity inventory, as soon as i try to open the gui, minecraft crashes with this error:

 

---- Minecraft Crash Report ----

// Don't be sad. I'll do better next time, I promise!

 

Time: 16-02-15 7.55.MD

Description: Ticking entity

 

java.lang.NullPointerException: Ticking entity

at net.minecraft.inventory.Slot.getStack(Slot.java:79)

at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:97)

at com.ae.GUI.ContainerCharger.detectAndSendChanges(ContainerCharger.java:33)

at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:263)

at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2031)

at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:758)

at net.minecraft.world.World.updateEntity(World.java:1997)

at net.minecraft.world.World.updateEntities(World.java:1823)

at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:587)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:775)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)

at java.lang.Thread.run(Unknown Source)

 

 

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

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at net.minecraft.inventory.Slot.getStack(Slot.java:79)

at net.minecraft.inventory.Container.detectAndSendChanges(Container.java:97)

at com.ae.GUI.ContainerCharger.detectAndSendChanges(ContainerCharger.java:33)

at net.minecraft.entity.player.EntityPlayerMP.onUpdate(EntityPlayerMP.java:263)

at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2031)

at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:758)

at net.minecraft.world.World.updateEntity(World.java:1997)

 

-- Entity being ticked --

Details:

Entity Type: null (net.minecraft.entity.player.EntityPlayerMP)

Entity ID: 335

Entity Name: Player671

Entity's Exact location: -14,62, 78,00, 161,56

Entity's Block location: -15,00,78,00,161,00 - World: (-15,78,161), Chunk: (at 1,4,1 in -1,10; contains blocks -16,0,160 to -1,255,175), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)

Entity's Momentum: 0,00, -0,08, 0,00

Entity's Rider: ~~ERROR~~ NullPointerException: null

Entity's Vehicle: ~~ERROR~~ NullPointerException: null

Stacktrace:

at net.minecraft.world.World.updateEntities(World.java:1823)

at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:587)

 

-- Affected level --

Details:

Level name: TestWorld

All players: 1 total; [EntityPlayerMP['Player671'/335, l='TestWorld', x=-14,62, y=78,00, z=161,56]]

Chunk stats: ServerChunkCache: 767 Drop: 0

Level seed: 124857476866170520

Level generator: ID 00 - default, ver 1. Features enabled: true

Level generator options:

Level spawn location: -228,00,64,00,256,00 - World: (-228,64,256), Chunk: (at 12,4,0 in -15,16; contains blocks -240,0,256 to -225,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)

Level time: 74678 game time, 12560 day time

Level dimension: 0

Level storage version: 0x04ABD - Anvil

Level weather: Rain time: 75600 (now: false), thunder time: 679 (now: true)

Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true

Stacktrace:

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:775)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)

at java.lang.Thread.run(Unknown Source)

 

-- System Details --

Details:

Minecraft Version: 1.8

Operating System: Windows 10 (amd64) version 10.0

Java Version: 1.8.0_66, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 737720064 bytes (703 MB) / 1056309248 bytes (1007 MB) up to 1056309248 bytes (1007 MB)

JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M

IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95

FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1450 4 mods loaded, 4 mods active

States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)

UCHIJAAAA FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.8-11.14.3.1450.jar)

UCHIJAAAA Forge{11.14.3.1450} [Minecraft Forge] (forgeSrc-1.8-11.14.3.1450.jar)

UCHIJAAAA ae{1.0} [AdvancedElectronics] (bin)

Loaded coremods (and transformers):

GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.

Profiler Position: N/A (disabled)

Player Count: 1 / 8; [EntityPlayerMP['Player671'/335, l='TestWorld', x=-14,62, y=78,00, z=161,56]]

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

 

 

The class of Tile Entity is on my original post.

[Choonster]

The

IInventory

you passed to the

Slot

constructor is

null

. I suspect this is because you haven't overridden

Block#hasTileEntity

to return

true

, so your

TileEntity

isn't being created.

[Cerandior]

Well i have overridden createTileEntity, shouldn't that create the tile-entity for that block? Anyway i overrided hasTileEntity but i am still getting the same problem.

[Choonster]

Block#createTileEntity

is only called if

Block#hasTileEntity

returns

true

.

 

Upload your latest FML log and

Block

,

Container

and

GuiContainer

classes to Gist with syntax highlighting and link them here.

[Cerandior]

The Block Class: https://gist.github.com/anonymous/ecd39b293c6e9c3e1027

The Tile-Entity Class: https://gist.github.com/anonymous/4f25e127ff126602848b

The Gui Handler Class: https://gist.github.com/anonymous/84ec07e27abbc9a45da9

The Container Class: https://gist.github.com/anonymous/9c57f12d747c4ca36c69

The Gui Class: https://gist.github.com/anonymous/ec53474e0863ac05351e

The Main Mod Class: https://gist.github.com/anonymous/e1ce366d6f90bbc0f38e

 

Latest Log: https://gist.github.com/anonymous/27bac0f0c47d6270ae40

[Cerandior]

To make this thing easier for later, i created a repository in github. You can check that out here: https://github.com/Cerandior/AdvancedElectronics

[Choonster]

You've overridden the deprecated method

Block#hasTileEntity()

. This method is never called, so your

TileEntity

is never created. You need to override

Block#hasTileEntity(IBlockState)

instead.

 

I would recommend creating a Git repository in the mod's root directory (where build.gradle and the src directory are) instead of in the src/main directory. IDE project files (e.g. Eclipse's .project file) don't need to be included in the repository, they can be generated by Gradle.

 

The

$ cat .gitignore

line of your .gitignore isn't doing anything and shouldn't be in there, it's a command that prints the contents a file (.gitignore in this case). I assume you copied it from this tutorial by Jabelar, it looks like he just screwed up the formatting.

[Cerandior]

Yes i just followed that tutorial. I am not experienced with git so i just went and did step by step what he said. As for the main problem. That serms convincing, i will try it when i get home