[1.12.2] Get the index of an inventory slot if it contains an item

[MisterGamer _]

Hi everyone,

I would have gotten the index of a player's inventory space if it contains a certain item.

I looked a bit if there was something that solved my problem, but I didn't find anything.

Thank you all!

Edited April 27, 2019 by MisterGamer _
Solved mark removed

[DavidM]

Iterate through player.inventory and record the index when the ItemStack is what you want.

 

Hint (pseudocode) :

Spoiler

for (int i = 0; i < player.inventory.getSizeInventory(); i++):

      if player.inventory.getStackInSlot(i) is what ya want:

            do stuff with i;

 

EDIT: Just realized that this is already solved...

Edited April 27, 2019 by DavidM

[MisterGamer _]

5 hours ago, DavidM said:

Iterate through player.inventory and record the index when the ItemStack is what you want.

 

Hint (pseudocode) :

  Hide contents

for (int i = 0; i < player.inventory.getSizeInventory(); i++):

      if player.inventory.getStackInSlot(i) is what ya want:

            do stuff with i;

 

EDIT: Just realized that this is already solved...

Thanks, I labeled it as solved, but I didn't find something helpful...

After The School i will try it.

[MisterGamer _]

13 hours ago, DavidM said:

Iterate through player.inventory and record the index when the ItemStack is what you want.

 

Hint (pseudocode) :

  Hide contents

for (int i = 0; i < player.inventory.getSizeInventory(); i++):

      if player.inventory.getStackInSlot(i) is what ya want:

            do stuff with i;

 

EDIT: Just realized that this is already solved...

Ok, I tried but it doesn't work...

[DavidM]

2 minutes ago, MisterGamer _ said:

Ok, I tried but it doesn't work...

1. Define "doesn't work".

2. Post your code.

[MisterGamer _]

Just now, DavidM said:

1. Define "doesn't work".

2. Post your code.

Ok, here it is:

@Override
	protected void actionPerformed(GuiButton button) throws IOException {
		if(button.id == 1) {
			Minecraft.getMinecraft().player.sendChatMessage("Click on the button of the item you want to craft.");
			Minecraft.getMinecraft().player.sendChatMessage("At the amount of items you should receive, there are some extra items! Enjoy the prize.");
		}else if(button.id == 2) {
			for(int i = 0; i < Minecraft.getMinecraft().player.inventory.getSizeInventory(); i++) {
				if(Minecraft.getMinecraft().player.inventory.getStackInSlot(i).equals(new ItemStack(ModItems.MYSTICAL_POWDER, 3))) {
					Minecraft.getMinecraft().player.inventory.addItemStackToInventory(new ItemStack(ModItems.MYSTICAL_INGOT));
					Minecraft.getMinecraft().player.inventory.decrStackSize(i, 3);
				}
			}
		}else if(button.id == 3) {
			for(int i = 0; i < Minecraft.getMinecraft().player.inventory.getSizeInventory(); i++) {
				if(Minecraft.getMinecraft().player.inventory.getStackInSlot(i).equals(new ItemStack(ModItems.MYSTICAL_INGOT, 3))) {
					Minecraft.getMinecraft().player.inventory.addItemStackToInventory(new ItemStack(ModItems.MYSTICAL_FUEL));
					Minecraft.getMinecraft().player.inventory.decrStackSize(i, 3);
				}
			}
		}
	}

 

[DavidM]

You cannot manipulate the player’s inventory on the client side.

Send a packet to the server when the button is clicked and perform the inventory editing on the server.

Edited April 27, 2019 by DavidM

[MisterGamer _]

1 minute ago, DavidM said:

You cannot manipulate the player’s inventory on the client side.

So what should I do to manipulate the player's inventory on the server side?

[DavidM]

21 minutes ago, MisterGamer _ said:

So what should I do to manipulate the player's inventory on the server side?

See my revised post:

23 minutes ago, DavidM said:

Send a packet to the server when the button is clicked and perform the inventory editing on the server.