Please!!!

Override method hashcode in ItemStack!

Unable to work normally with ItemStack in HashMap

And how then work normally with ItemStask in HashMap?

P.S

It's Item and damage value.

If you really need to compare ItemStacks just create a Comparator<ItemStack> with whatever you need to be sorting by. Use this in a TreeMap rather than a HashMap.

I usually sort null -> item id -> metadata -> quantity -> having nbt -> nbt equals

 

You can sort by anything else afterwards.

 

It just takes a bit of thinking, it isn't too bad.

We did modders bitched, so we removed it. Sorry blame the rest of the modders.

Write a wrapper for the ItemStack, now everything is working fine.

/** 
* @author Agravaine
*/
public class ItemStackHash{

private ItemStack iStack;

private boolean doCheckNBT = false;
private boolean doCheckStackSize = false;
private boolean doCheckDamage = false;

public ItemStackHash(Block block){
	this(block, 1);
}

public ItemStackHash(Block block, int count){
	this(block, count, 0);
}

public ItemStackHash(Block block, int count, int damage){
	this(Item.getItemFromBlock(block), count, damage);
}

public ItemStackHash(Item item){
	this(item, 1);
}

public ItemStackHash(Item item, int count){
	this(item, count, 0);
}

public ItemStackHash(Item item, int count, int damage){
	iStack = new ItemStack(Preconditions.checkNotNull(item, "Item is null!"), count, damage);
}

public ItemStackHash(ItemStack itemStack){
	iStack = Preconditions.checkNotNull(itemStack, "ItemStack is null!");
}

private ItemStackHash(){
	throw new UnsupportedOperationException("Unsupported empty constructor!");
}

public ItemStackHash setDoCheckDamage(){
	doCheckDamage = true;
	return this;
}

public ItemStackHash setDoCheckStackSize(){
	doCheckStackSize = true;
	return this;
}

public ItemStackHash setDoCheckNBT(){
	doCheckNBT = true;
	return this;
}

public ItemStackHash setChecks(ItemStackHash parent){
	doCheckNBT = parent.doCheckNBT;
	doCheckDamage = parent.doCheckDamage;
	doCheckStackSize = parent.doCheckStackSize;
	return this;
}

public ItemStack getItemStack(){
	return iStack;
}

public int hashCode(){
	final int prime = 31;
	int result = 1;
	result = prime * result + Item.getIdFromItem(iStack.getItem());
	result = prime * result + (doCheckDamage ? iStack.getItemDamage() : 0);
	result = prime * result + (doCheckStackSize ? iStack.stackSize : 0);
	result = prime * result + (doCheckNBT && iStack.hasTagCompound() ? iStack.stackTagCompound.hashCode() : 0);
	return result;
}

public boolean equals(Object obj) {
	if(!(obj instanceof ItemStackHash)){
		return false;
	}

	ItemStackHash hashStack = (ItemStackHash)obj;

	if(Item.getIdFromItem(iStack.getItem()) != Item.getIdFromItem(hashStack.iStack.getItem())){
		return false;
	}

	if(doCheckDamage && iStack.getItemDamage() != hashStack.iStack.getItemDamage()){
		return false;
	}

	if(doCheckNBT && iStack.stackTagCompound != hashStack.iStack.stackTagCompound){
		return false;
	}

	if(doCheckStackSize && iStack.stackSize != hashStack.iStack.stackSize){
		return false;
	}

	return true;
}

public String toString(){
	return iStack.toString();
}
}

Detail, please.