1.7.10 Custom furnace getItemburntime error

This is the code:

package com.SY031.tile_entity;

import com.SY031.block.TMBlock;
import com.SY031.block.washingmachine;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
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.ItemBlock;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.FurnaceRecipes;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.WeightedRandom.Item;

public class TileEntitywashingmachine extends TileEntity implements ISidedInventory{

	private static final int[] slotsTop = new int[]{0};
	private static final int[] slotsBottom = new int[]{2, 1};
	private static final int[] slotsSides = new int[] { 1 };
	
	private ItemStack[] furnaceItemStacks = new ItemStack[3];
	
	public int furnaceBurnTime;
	public int currentBurnTime;
	public int furnaceCookTime;
	
	private String furnaceName;
	
	public void furnaceName(String string){
	this.furnaceName = string;
	}
	@Override
	public int getSizeInventory() {
		return this.furnaceItemStacks.length;
	}

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

	@Override
	public ItemStack decrStackSize(int par1, int par2) {
		if(this.furnaceItemStacks[par1] != null){
			ItemStack itemstack;
			if(this.furnaceItemStacks[par1].stackSize <= par2){
				itemstack = this.furnaceItemStacks[par1];
						this.furnaceItemStacks[par1] = null;
						return itemstack;
		}else{
			itemstack = this.furnaceItemStacks[par1].splitStack(par2);
			
			if(this.furnaceItemStacks[par1].stackSize == 0){
				this.furnaceItemStacks[par1] = null;
				
			
			}
					return itemstack;
		}
		}else {
			return null;
		}
	}

	@Override
	public ItemStack getStackInSlotOnClosing(int slot){
		if(this.furnaceItemStacks[slot] != null){
			ItemStack itemstack = this.furnaceItemStacks[slot];
			this.furnaceItemStacks[slot] = null;
			return itemstack;
	}else{
		return null;
	}
	}
	@Override
	public void setInventorySlotContents(int slot,ItemStack itemstack) {
		this.furnaceItemStacks[slot] = itemstack;
		
		if(itemstack != null && itemstack.stackSize > this.getInventoryStackLimit()){
			itemstack.stackSize = this.getInventoryStackLimit();
	
		}
		
	}

	@Override
	public String getInventoryName() {
		return this.hasCustomInventoryName() ? this.furnaceName : "세탁기";
	}

	@Override
	public boolean hasCustomInventoryName() {
		return this.furnaceName != null && this.furnaceName.length() > 0;
	}

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

	public void readFromNBT(NBTTagCompound tagCompound){
		super.readFromNBT(tagCompound);
		NBTTagList tagList = tagCompound.getTagList("Items", 10);
		this.furnaceItemStacks = new ItemStack[this.getSizeInventory()];
		
		for(int i = 0; i < tagList.tagCount(); ++i){
			NBTTagCompound tagCompound1 = tagList.getCompoundTagAt(i);
					byte byte0 =tagCompound1.getByte("Slot");
			
			if(byte0 >= 0 && byte0 < this.furnaceItemStacks.length){
				this.furnaceItemStacks[byte0] = ItemStack.loadItemStackFromNBT(tagCompound1);
				
			}
		}
		this.furnaceBurnTime = tagCompound.getShort("BurnTime");
		this.furnaceCookTime = tagCompound.getShort("CookTime");
		this.currentBurnTime = getItemBurnTime(this.furnaceItemStacks[1]);
		
		if(tagCompound.hasKey("CustomName" , 8)){
			this.furnaceName = tagCompound.getString("CustomName");
		}
		}
	
	public void writeToNBT(NBTTagCompound tagCompound){
		super.writeToNBT(tagCompound);
		
		tagCompound.setShort("BurnTime", (short) this.furnaceBurnTime);
		tagCompound.setShort("CookTime", (short) this.furnaceBurnTime);
		NBTTagList taglist =  new NBTTagList();
		
		for(int i = 0; i < this.furnaceItemStacks.length; ++i)
		{
			if(this.furnaceItemStacks[i] != null){
				NBTTagCompound tagCompound1 = new NBTTagCompound();
				tagCompound1.setByte("Slot",(byte) i);
				this.furnaceItemStacks[i].writeToNBT(tagCompound1);
				taglist.appendTag(tagCompound1);
			}
			
		}
		
		tagCompound.setTag("Items", taglist);
		
		if(this.hasCustomInventoryName()){
			tagCompound.setString("CustomName", this.furnaceName);
		}
	}
	
	@SideOnly(Side.CLIENT)
	public int getCookProgressScaled(int par1){
		return this.furnaceCookTime * par1 / 200;
	}
	@SideOnly(Side.CLIENT)
	public int getBurnTimeRemainingScaled(int par1){
		if(this.currentBurnTime == 0){
			this.currentBurnTime = 200;
		}
		
		return this.furnaceBurnTime * par1 / this.currentBurnTime;
	}
	
	public boolean isBurning(){
		return this.furnaceBurnTime > 0;
	}
	public void updateEntity(){
		boolean flag = this.furnaceBurnTime > 0;
		boolean flag1 = false;
		
		if(this.furnaceBurnTime > 0){
			--this.furnaceBurnTime;
		}
		
		if(!this.worldObj.isRemote){
			if(this.isBurning() && this.canSmelt()){
				this.currentBurnTime = this.furnaceBurnTime = getItemBurnTime(this.furnaceItemStacks[1]);
				
				if(this.furnaceBurnTime > 0){
					flag1 = true;
					if(this.furnaceItemStacks[1] != null){
						--this.furnaceItemStacks[1].stackSize;
						
						if(this.furnaceItemStacks[1].stackSize == 0){
							this.furnaceItemStacks[1] = furnaceItemStacks[1].getItem().getContainerItem(this.furnaceItemStacks[1]);
							
						}
					}

				}
			}
			
			if(this.isBurning() && this.canSmelt()){
				++this.furnaceCookTime;
				if(this.furnaceCookTime == 200){
					this.furnaceCookTime = 0;
					this.smeltItem();
					flag1 = true;
				}
			}else{
				this.furnaceCookTime = 0;
			}
		}
		
		if(flag != this.furnaceBurnTime > 0){
			flag1 =true;
					washingmachine.updateBlockState(this.furnaceBurnTime > 0, this.worldObj, this.xCoord, this.yCoord, this.zCoord);
		}
		if(flag1){
			this.markDirty();
		}
	}
	
	private boolean canSmelt(){
		if(this.furnaceItemStacks[0] == null){
			return false;
		}else{
			ItemStack itemstack = FurnaceRecipes.smelting().getSmeltingResult(this.furnaceItemStacks[0]);
			if(itemstack ==null) return false;
			if(this.furnaceItemStacks[2] == null) return true;
			if(!this.furnaceItemStacks[2].isItemEqual(itemstack)) return false;
			int result = furnaceItemStacks[2].stackSize + itemstack.stackSize;
			return result <= getInventoryStackLimit() && result <= this.furnaceItemStacks[2].getMaxStackSize();
		}
	}
	
	public void smeltItem(){
		if(this.canSmelt()){
			ItemStack itemstack = FurnaceRecipes.smelting().getSmeltingResult(this.furnaceItemStacks[0]);
			
			if(this.furnaceItemStacks[2] == null){
				this.furnaceItemStacks[2]= itemstack.copy();
			}else if(this.furnaceItemStacks[2].getItem() == itemstack.getItem()){
				this.furnaceItemStacks[2].stackSize += itemstack.stackSize;
			}
			
			--this.furnaceItemStacks[0].stackSize;
			
			if(this.furnaceItemStacks[0].stackSize >= 0);
				this.furnaceItemStacks[0] = null;
		}
	}
	public static int getItemBurnTime(ItemStack itemstack){
		if(itemstack == null){
			return 0;
			
		}else{
	net.minecraft.item.Item item = itemstack.getItem();
			
	if(item instanceof ItemBlock && Block.getBlockFromItem(item) != Blocks.air){
		Block block = Block.getBlockFromItem(item);
	}
		}
					}
		public static boolean isItemFuel(ItemStack itemstack){
			return getItemBurnTime(itemstack) > 0;

		}	
	@Override
	public boolean isUseableByPlayer(EntityPlayer Player) {
		return this.worldObj.getTileEntity(this.xCoord, this.yCoord, this.zCoord) != this ? false : Player.getDistanceSq((double) this.xCoord + 0.5D, (double) this.yCoord + 0.5D, (double) this.zCoord + 0.5D) <= 64.0D;
	}

	@Override
	public void openInventory() {
		
		
	}

	@Override
	public boolean isItemValidForSlot(int par1, ItemStack itemstack){
		
		return par1 == 2 ? false : (par1 == 1 ? isItemFuel(itemstack): true);
	}

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

	@Override
	public int[] getAccessibleSlotsFromSide(int par1){
		return par1 == 0 ? slotsBottom : (par1 == 1 ? slotsTop :slotsSides);
	}

	@Override
	public boolean canInsertItem(int par1, ItemStack itemstack, int par3) {
		return this.isItemValidForSlot(par1, itemstack);
	}

	@Override
	public boolean canExtractItem(int par1, ItemStack itemstack, int par3) {
		return par3 != 0 || par1 != 1 || itemstack.getItem() == Items.bucket;
	}

}

Everything works fine except the 'getItemburntime ' one.... could someone hlep me?