[1.7.2]Two Slot input crash

Posted April 24, 201411 yr

So i tried to make a alloy smelter and when i only put something in the one slot it crashes

---- Minecraft Crash Report ----

// Why did you do that?

Time: 4/23/14 8:49 PM

Description: Ticking block entity

java.lang.NullPointerException: Ticking block entity

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.getresult(TileEntityIronOxideAlloy.java:271)

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.canGrinde(TileEntityIronOxideAlloy.java:240)

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.updateEntity(TileEntityIronOxideAlloy.java:207)

at net.minecraft.world.World.updateEntities(World.java:2148)

at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:536)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:740)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:651)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:120)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:530)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:788)

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

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

-- Head --

Stacktrace:

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.getresult(TileEntityIronOxideAlloy.java:271)

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.canGrinde(TileEntityIronOxideAlloy.java:240)

at com.professorvennie.tileEntity.TileEntityIronOxideAlloy.updateEntity(TileEntityIronOxideAlloy.java:207)

-- Block entity being ticked --

Details:

Name: null // com.professorvennie.tileEntity.TileEntityIronOxideAlloy

Block type: ID #191 (tile.ironOxideAlloyIdle // com.professorvennie.block.machines.ironOxideAlloy)

Block data value: 4 / 0x4 / 0b0100

Block location: World: (1009,4,-137), Chunk: (at 1,0,7 in 63,-9; contains blocks 1008,0,-144 to 1023,255,-129), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)

Actual block type: ID #192 (tile.ironOxideAlloyActive // com.professorvennie.block.machines.ironOxideAlloy)

Actual block data value: 4 / 0x4 / 0b0100

Stacktrace:

at net.minecraft.world.World.updateEntities(World.java:2148)

at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:536)

-- Affected level --

Details:

Level name: Copy of New World

All players: 1 total; [EntityPlayerMP['Player463'/86, l='Copy of New World', x=1007.84, y=4.00, z=-136.43]]

Chunk stats: ServerChunkCache: 625 Drop: 0

Level seed: 3993669303325543658

Level generator: ID 01 - flat, ver 0. Features enabled: true

Level generator options:

Level spawn location: World: (1010,4,-135), Chunk: (at 2,0,9 in 63,-9; contains blocks 1008,0,-144 to 1023,255,-129), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)

Level time: 131410 game time, 73565 day time

Level dimension: 0

Level storage version: 0x04ABD - Anvil

Level weather: Rain time: 25227 (now: false), thunder time: 111332 (now: false)

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

Stacktrace:

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:740)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:651)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:120)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:530)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:788)

-- System Details --

Details:

Minecraft Version: 1.7.2

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.7.0_51, Oracle Corporation

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

Memory: 850582768 bytes (811 MB) / 1056309248 bytes (1007 MB) up to 1056309248 bytes (1007 MB)

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

AABB Pool Size: 1852 (103712 bytes; 0 MB) allocated, 1566 (87696 bytes; 0 MB) used

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

FML: MCP v9.01-pre FML v7.2.129.1047 Minecraft Forge 10.12.0.1047 4 mods loaded, 4 mods active

mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

FML{7.2.129.1047} [Forge Mod Loader] (forgeSrc-1.7.2-10.12.0.1047.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Forge{10.12.0.1047} [Minecraft Forge] (forgeSrc-1.7.2-10.12.0.1047.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

ef{0.1.0} [Extra Food] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Profiler Position: N/A (disabled)

Vec3 Pool Size: 246 (13776 bytes; 0 MB) allocated, 170 (9520 bytes; 0 MB) used

Player Count: 1 / 8; [EntityPlayerMP['Player463'/86, l='Copy of New World', x=1007.84, y=4.00, z=-136.43]]

Type: Integrated Server (map_client.txt)

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

Here is my tileentity class

package com.professorvennie.tileEntity;

import java.util.Random;

import com.professorvennie.block.EFBlock;
import com.professorvennie.block.machines.ironOxideAlloy;
import com.professorvennie.block.machines.ironOxideGrinder;
import com.professorvennie.item.EFitem;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
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.minecraftforge.common.util.Constants;
import net.minecraftforge.oredict.OreDictionary;

public class TileEntityIronOxideAlloy extends TileEntity implements ISidedInventory{
private String localizedName;

private  Random rand = new Random();

private static final int[] slots_top = new int[]{0};
private static final int[] slots_bottom = new int[]{2, 1};
private static final int[] slots_sides = new int[]{1};

private ItemStack[] slots = new ItemStack[4];

public int GrindeSpeed = 80;

public int power;
public final int  maxpower = 10000;

public int currentItemBurnTime;

public int cookTime;

private int smeltItem;

public int getsizeInventory(){
	return this.slots.length;
}



@Override
public ItemStack getStackInSlot(int var1) {
	return this.slots[var1];
}

@Override
public ItemStack decrStackSize(int var1, int var2) {
	if(this.slots[var1] != null){
		ItemStack itemstack;
		if(this.slots[var1].stackSize <= var2){
			itemstack = this.slots[var1];
			this.slots[var1] = null;
			return itemstack;
		}else{
			itemstack = this.slots[var1].splitStack(var2);
			if(this.slots[var1].stackSize == 0){
				this.slots[var1] = null;
			}
			return itemstack;
		}
	}
	return null;
}

@Override
public ItemStack getStackInSlotOnClosing(int var1) {
	if(this.slots[var1] != null){
		ItemStack itemstack = this.slots[var1];
		this.slots[var1] = null;
		return itemstack;
	}

	return null;
}

@Override
public void setInventorySlotContents(int var1, ItemStack var2) {
	this.slots[var1]= var2;

	if(var2 != null && var2.stackSize > this.getInventoryStackLimit()){
		var2.stackSize = this.getInventoryStackLimit();
	}
}

@Override
public String getInventoryName() {
	// TODO Auto-generated method stub
	return null;
}

@Override
public boolean hasCustomInventoryName() {
	// TODO Auto-generated method stub
	return false;
}

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

public void readFromNBT(NBTTagCompound nbt){
	super.readFromNBT(nbt);

	NBTTagList list = nbt.getTagList("items", Constants.NBT.TAG_COMPOUND);
	this.slots = new ItemStack[this.getsizeInventory()];

	for(int i = 0; i < list.tagCount(); i ++){
		NBTTagCompound compound = list.getCompoundTagAt(i);
		 int j = compound.getByte("slot") & 0xff;

		if(j >= 0 && j < this.slots.length){
			this.slots[j] = ItemStack.loadItemStackFromNBT(compound);

		}
	}
	this.power = (int)nbt.getShort("burntime");
	this.cookTime = (int)nbt.getShort("cooktime");
	this.currentItemBurnTime = (int)nbt.getShort("currentItemBurnTime");

	if(nbt.hasKey("customname")){
		this.localizedName = nbt.getString("customname");
	}

}

public void writeToNBT(NBTTagCompound nbt){
	super.writeToNBT(nbt);

	nbt.setShort("burntime", (short) this.power);
	nbt.setShort("cooktime", (short) this.cookTime);
	nbt.setShort("currentItemBurnTime", (short) this.currentItemBurnTime);

	NBTTagList list = new NBTTagList();

	for(int i = 0; i < this.slots.length; i ++){
		if(this.slots[i] != null){
			NBTTagCompound compound = new NBTTagCompound();
			compound.setByte("slot", (byte) i);
			this.slots[i].writeToNBT(compound);
			list.appendTag(compound);
		}
	}
	nbt.setTag("items", list);
	if(this.isInvNameLocalized()){
		nbt.setString("customname", this.localizedName);
	}
}

@Override
public boolean isUseableByPlayer(EntityPlayer var1) {
	return this.worldObj.getTileEntity(this.xCoord, this.yCoord, this.zCoord) != this ? false : var1.getDistanceSq((double)this.xCoord + 0.5D, (double)this.yCoord + 0.5D, (double)this.zCoord + 0.5D) <= 64D;
}

@Override
public void openInventory() {
	// TODO Auto-generated method stub

}

@Override
public void closeInventory() {
	// TODO Auto-generated method stub

}

public boolean hasPower(){
	if(this.power> 0) return true;

	return false;
}

public boolean isGrinding(){
	return this.cookTime > 0;
}

public void updateEntity(){
	boolean flag = this.power > 0;
    	boolean flag1 = false;

    	if (hasPower() && isGrinding()){
        		this.power--;
    	}

    	if (!this.worldObj.isRemote){
        	if (this.power < this.maxpower && this.getItemPower(this.slots[1]) > 0){
        		this.power += getItemPower(this.slots[1]);

        		flag1 = true;
        	
        		if (this.slots[1] != null){
                		this.slots[1].stackSize--;

                		if (this.slots[1].stackSize == 0){
                    		this.slots[1] = this.slots[1].getItem().getContainerItem(slots[1]);
                		}
            	}                
        	}
        	if (this.hasPower() && this.canGrinde())
        	{
            	this.cookTime++;

            	if (this.cookTime == this.GrindeSpeed)
            	{
                	this.cookTime = 0;
                	this.GrindItem();
               	flag1 = true;
            	}
        	}
        	else
        	{
            	this.cookTime = 0;
        	}

		if(flag != this.hasPower()){
			flag1 = true;
			ironOxideAlloy.updateGrinderBlockState(this.power > 0, this.worldObj, this.xCoord, this.yCoord, this.zCoord);
		}

	}


if(flag1){
	this.markDirty();
}
}

private boolean canGrinde(){
	if(this.slots[0] == null){
		return false;
	}else{
		ItemStack itemstack = getresult(this.slots[0], this.slots[3]);

		if(itemstack == null) return false;
		if(this.slots[2] == null) return true;
		if(!this.slots[2].isItemEqual(itemstack)) return false;

		int result = this.slots[2].stackSize + itemstack.stackSize;

		return (result <= getInventoryStackLimit() && result <= itemstack.getMaxStackSize());


	}
}

public ItemStack getresult(ItemStack itemstack, ItemStack itemstack2) {
//		itemstack = getStackInSlot(0);
//		itemstack2 = getStackInSlot(3);
//		if(itemstack.getUnlocalizedName().equals(Items.iron_ingot.getUnlocalizedName())){
//			if(itemstack2.getUnlocalizedName().equals(EFitem.saltingot.getUnlocalizedName())){
//				return new ItemStack(EFitem.ironoxide);
//			}
//			else
//			if(itemstack.getUnlocalizedName().equals(EFitem.saltingot.getUnlocalizedName())){
//				if(itemstack2.getUnlocalizedName().equals(Items.iron_ingot.getUnlocalizedName())){
//					return new ItemStack(EFitem.ironoxide, 2);
//				}
//			}
//			else
//				return null;
//		}
	int i = itemstack.getItem().getIdFromItem(itemstack.getItem());
	int j = itemstack2.getItem().getIdFromItem(itemstack2.getItem());
	if (i == Items.iron_ingot.getIdFromItem(Items.iron_ingot) && j == EFitem.saltingot.getIdFromItem(EFitem.saltingot))
		return new ItemStack(EFitem.ironoxide, 2);
	if (i == EFitem.saltingot.getIdFromItem(EFitem.saltingot) && j == Items.iron_ingot.getIdFromItem(Items.iron_ingot))
		return new ItemStack(EFitem.ironoxide, 2);
	return null;

}

public void GrindItem(){
	if(this.canGrinde()){
		ItemStack itemstack = this.getresult(this.slots[0], this.slots[3]);

		if (this.slots[2] == null) {
			this.slots[2] = itemstack.copy();
		} else if (this.slots[2].isItemEqual(itemstack)) {
			this.slots[2].stackSize += itemstack.stackSize;
		}

		this.slots[0].stackSize--;
		this.slots[3].stackSize--;

		if (this.slots[0].stackSize <= 0) {
			this.slots[0] = null;
		}
}
}

public static int getItemPower(ItemStack itemstack){
	if(itemstack == null){
		return 0;
	}else{
		int i = itemstack.getItem().getIdFromItem(itemstack.getItem());



		if(i == EFitem.saltcyrstals.getIdFromItem(EFitem.saltcyrstals)) return 100;

		return 0;
	}
}

public static boolean isItemPower(ItemStack itemstack){
	return getItemPower(itemstack) > 0;
}

@Override
public boolean isItemValidForSlot(int var1, ItemStack var2) {

	return var1 == 2 ? false : (var1 == 1 ? isItemPower(var2) : true);
}

@Override
public int[] getAccessibleSlotsFromSide(int var1) {
	return var1 == 0 ? slots_bottom  : (var1 == 1 ? slots_top : slots_sides);
}

@Override
public boolean canInsertItem(int var1, ItemStack var2, int var3) {
	return this.isItemValidForSlot(var1, var2);
}

@Override
public boolean canExtractItem(int var1, ItemStack var2, int var3) {
	return var3 != 0 || var1 != 1 || var2.getItem() == Items.bucket;
}

public int getCookProgressScaled(int par1)
{
  		return this.cookTime * par1 / this.GrindeSpeed;
}

public int getPowerRemainingScaled(int par1){
    	return this.power * par1 / this.maxpower;
}

public boolean isInvNameLocalized() {
	return false;
}

public String getInvName() {
	return "container.IronOxideAlloy";
}

public void setGuiDisplayName(String displayName) {

}



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



public int getCurrentCharge() {
	return this.power;
}



public int getChargeCapcity() {
	return this.maxpower;
}

}

Quote

April 24, 201411 yr

Adding some null checks in getResult should work.

Creator of Jobo's ModLoader

If I helped you could you please click the thank you button and applaud my karma.

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[1.7.2]Two Slot input crash

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