[Solved]Tile Entity Errors

[ninjapancakes87]

So I'm trying to make a portable chest (haversack) that functions the same as the alchemical bag from EE2/EE3.  When held, and right clicked, it opens a GUI.  I'm using a tile entity for this, and I've gotten tile entity's to work before.  However, now, I get this error:

 

2014-01-04 22:45:48 [iNFO] [sTDERR] java.lang.NullPointerException
2014-01-04 22:45:48 [iNFO] [sTDERR] 	at ninjapancakes87.civilwar.item.haversack.ContainerHaversack.<init>(ContainerHaversack.java:16)

This is the suspect line:

this.numRows = par2IInventory.getSizeInventory() / 9;

 

I have tried fixing this by hardcoding a number in, but this just leads to more problems, all dealing with the TileEntityHaversack class.  I made sure I called

GameRegistry.registerTileEntity(TileEntityHaversack.class, "Haversack");

in my load method.

Here is my TileEntity:

TileEntityHaversack:

 

package ninjapancakes87.civilwar.item.haversack;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.tileentity.TileEntity;

public class TileEntityHaversack extends TileEntity implements IInventory{
private ItemStack[] chestContents = new ItemStack[27];

@Override
public ItemStack getStackInSlot(int par1) {
	return this.chestContents[par1];
}

@Override
public ItemStack decrStackSize(int par1, int par2) {
	if (this.chestContents[par1] != null)
        {
            ItemStack itemstack;

            if (this.chestContents[par1].stackSize <= par2)
            {
                itemstack = this.chestContents[par1];
                this.chestContents[par1] = null;
                this.onInventoryChanged();
                return itemstack;
            }
            else
            {
                itemstack = this.chestContents[par1].splitStack(par2);

                if (this.chestContents[par1].stackSize == 0)
                {
                    this.chestContents[par1] = null;
                }

                this.onInventoryChanged();
                return itemstack;
            }
        }
        else
        {
            return null;
        }
}

@Override
public ItemStack getStackInSlotOnClosing(int par1) {
	if (this.chestContents[par1] != null)
        {
            ItemStack itemstack = this.chestContents[par1];
            this.chestContents[par1] = null;
            return itemstack;
        }
        else
        {
            return null;
        }
}
@Override
public void setInventorySlotContents(int i, ItemStack par2ItemStack) {
	this.chestContents[i] = par2ItemStack;

        if (par2ItemStack != null && par2ItemStack.stackSize > this.getInventoryStackLimit())
        {
            par2ItemStack.stackSize = this.getInventoryStackLimit();
        }

        this.onInventoryChanged();		
}

@Override
public String getInvName() {
	return "Haversack";
}

@Override
public boolean isInvNameLocalized() {
	return false;
}

@Override
public int getInventoryStackLimit() {
	return 64;
}

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

@Override
public void openChest() {		
}

@Override
public void closeChest() {	
}

@Override
public boolean isItemValidForSlot(int i, ItemStack itemstack) {
	return true;
}
@Override
public int getSizeInventory() {
	return 27;
}
public void readFromNBT(NBTTagCompound par1NBTTagCompound)
    {
        super.readFromNBT(par1NBTTagCompound);
        NBTTagList nbttaglist = par1NBTTagCompound.getTagList("Items");
        this.chestContents = new ItemStack[this.getSizeInventory()];

        for (int i = 0; i < nbttaglist.tagCount(); ++i)
        {
            NBTTagCompound nbttagcompound1 = (NBTTagCompound)nbttaglist.tagAt(i);
            int j = nbttagcompound1.getByte("Slot") & 255;

            if (j >= 0 && j < this.chestContents.length)
            {
                this.chestContents[j] = ItemStack.loadItemStackFromNBT(nbttagcompound1);
            }
        }
    }

    /**
     * Writes a tile entity to NBT.
     */
    public void writeToNBT(NBTTagCompound par1NBTTagCompound)
    {
        super.writeToNBT(par1NBTTagCompound);
        NBTTagList nbttaglist = new NBTTagList();

        for (int i = 0; i < this.chestContents.length; ++i)
        {
            if (this.chestContents[i] != null)
            {
                NBTTagCompound nbttagcompound1 = new NBTTagCompound();
                nbttagcompound1.setByte("Slot", (byte)i);
                this.chestContents[i].writeToNBT(nbttagcompound1);
                nbttaglist.appendTag(nbttagcompound1);
            }
        }

        par1NBTTagCompound.setTag("Items", nbttaglist);
    }
}

 

[Draco18s]

Suspect line is not in the class provided.

[ninjapancakes87]

Suspect line is not in the class provided.

It's in a different class, the container, but I figured it out.  I don't need a TileEntity because I don't have a block, so I just removed all references to it and it's good.