[1.16.5] Help with custom container (error when put a item in an slot)

Luis_ST · February 23

I have a custom container. which consists of a crafting part and a storage.

when i try to shift an item into the slot i got an error and i dont know why.

because my container theoretically consists of 28 chest slots and 9 crafting input slots and one crafting output.

so a total of 38 slots.

But if I use 38 as the size of the NonNullList in my tileentity, I get an ArrayIndexOutOfBoundsException.

I tried something and found out that my inventory has a size of 74 slots, but I only use 38 in the constructor of my container.

when i put an item in a slot i get an error:

according to the error, the slot has the id -999 which can not be

So why do I get this error and what's wrong with my container:

[17:11:27] [Render thread/FATAL] [minecraft/Minecraft]: Reported exception thrown!
net.minecraft.crash.ReportedException: Container click
	at net.minecraft.client.gui.screen.Screen.wrapScreenError(Screen.java:434) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHelper.mouseButtonCallback(MouseHelper.java:96) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHelper.lambda$null$4(MouseHelper.java:185) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(ThreadTaskExecutor.java:86) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.MouseHelper.lambda$registerCallbacks$5(MouseHelper.java:184) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
	at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.2.2.jar:build 10] {}
	at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
	at com.mojang.blaze3d.systems.RenderSystem.flipFrame(RenderSystem.java:93) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MainWindow.flipFrame(MainWindow.java:305) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1022) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:612) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
Caused by: java.lang.ArrayIndexOutOfBoundsException
[17:11:27] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:130]: ---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 23.02.21, 17:11
Description: Container click

java.lang.ArrayIndexOutOfBoundsException: null


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

-- Head --
Thread: Render thread
Stacktrace:
	at net.minecraft.inventory.container.Container.slotClick(Container.java:182) ~[forge:?] {re:classloading}
-- Click info --
Details:
	Menu Type: cave:crafting_station
	Menu Class: net.luis.cave.common.inventory.container.CraftingStationContainer
	Slot Count: 74
	Slot: -999
	Button: 10
	Type: QUICK_CRAFT
Stacktrace:
	at net.minecraft.inventory.container.Container.slotClick(Container.java:182) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
	at net.minecraft.client.multiplayer.PlayerController.windowClick(PlayerController.java:409) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screen.inventory.ContainerScreen.handleMouseClick(ContainerScreen.java:558) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screen.inventory.ContainerScreen.mouseReleased(ContainerScreen.java:515) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHelper.lambda$mouseButtonCallback$1(MouseHelper.java:98) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screen.Screen.wrapScreenError(Screen.java:427) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHelper.mouseButtonCallback(MouseHelper.java:96) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHelper.lambda$null$4(MouseHelper.java:185) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(ThreadTaskExecutor.java:86) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.MouseHelper.lambda$registerCallbacks$5(MouseHelper.java:184) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
	at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.2.2.jar:build 10] {}
	at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101) ~[lwjgl-glfw-3.2.2.jar:build 10] {}
	at com.mojang.blaze3d.systems.RenderSystem.flipFrame(RenderSystem.java:93) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MainWindow.flipFrame(MainWindow.java:305) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1022) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:612) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.0.1_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {

Draco18s · February 23

Post your code.

Luis_ST · February 23

6 minutes ago, Draco18s said:

Post your code.

container:

https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/main/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/common/inventory/container/CraftingStationContainer.java

tileentity:

https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/main/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/common/tileentity/CraftingStationTileEntity.java

I think these are all relevant classes

diesieben07 · February 23

The index calculation here is wrong: https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/b801410326b0e641c1e7e0a07136049f86ec0154/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/common/inventory/container/CraftingStationContainer.java#L59

Luis_ST · February 24

13 hours ago, diesieben07 said:

The index calculation here is wrong:

okay thanks, i still have a problem i can't craft all items at once (with shift in the output slot).

I think it's because of the TransferStackInSlot method but what do I have to change?

https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/main/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/common/inventory/container/CraftingStationContainer.java

general: when I shift items into an inventory, the item is always placed in the slot with the smallest index. Am I right ?

Edited February 24 by Luis_ST

diesieben07 · February 24

1 hour ago, Luis_ST said:

general: when I shift items into an inventory, the item is always placed in the slot with the smallest index. Am I right ?

You control how shift-clicking works using the transferStackInSlot method.

Luis_ST · February 24

22 minutes ago, diesieben07 said:

You control how shift-clicking works using the transferStackInSlot method.

i am trying to combine the methods of chestcontainer and the workbenchcontainer

another question about container.

in which class does minecraft create the creativ inventory? (edit: because I cannot find the class in the container package)

since i want to create a container with as many slots as possible i have already succeeded (the container has 200 slots).

but it looks a bit strange because of the width.

I would like to know how minecraft creates the creative inventory because it has the normal width and a scrollbar.

and i want to do something like that for a block

Edited February 24 by Luis_ST

diesieben07 · February 24

2 hours ago, Luis_ST said:

in which class does minecraft create the creativ inventory? (edit: because I cannot find the class in the container package)

CreativeScreen

2 hours ago, Luis_ST said:

I would like to know how minecraft creates the creative inventory because it has the normal width and a scrollbar.

and i want to do something like that for a block

You're in for a world of pain. The best way I know to achieve this is as follows:

Add all the slots you would need.
Position invisible slots off-screen (Slot#xPos = -999 or something like that).
When scrolling, move the slots around so that they are in the correct position according the scroll position. Note that you must do this on client and server, so the client needs to send a packet to the server regarding the new scroll position.

Luis_ST · February 24

49 minutes ago, diesieben07 said:

Add all the slots you would need.

Position invisible slots off-screen (Slot#xPos = -999 or something like that).

When scrolling, move the slots around so that they are in the correct position according the scroll position.

okay thank you i think i should manage that somehow

one more question about the scrollbar

I looked into the vanilla container using a scrollbar (stonecutter container) and

if I understand correctly, the scrollbar is a graphic element. I don't have to add the scrollbar to the container.

if that's true how do i find out if the player moves the scrollbar?

diesieben07 · February 24

The stonecutter doesn't have scrollable slots, just a scrollable area (you can't take the items in the scrollable area or put items in).

36 minutes ago, Luis_ST said:

if that's true how do i find out if the player moves the scrollbar?

Look at StonecutterScreen.

Luis_ST · February 24

1 hour ago, diesieben07 said:

Look at StonecutterScreen.

thanks, I'll try the way you explained it

Hippl · February 24

GL

Edited February 24 by Hippl

Luis_ST · Thursday at 01:53 PM

On 2/24/2021 at 12:13 PM, diesieben07 said:

Add all the slots you would need.

Position invisible slots off-screen (Slot#xPos = -999 or something like that).

I have the container and the screen as you described it and it works (what I have created so far).

But now I'm stuck I don't know how to reposition the slots and how to sync this between server and client.

diesieben07 · Thursday at 01:55 PM

Reposition the slots by changing their position.

Sync this, by sending a packet.

Luis_ST · Thursday at 02:14 PM

14 minutes ago, diesieben07 said:

Reposition the slots by changing their position.

Currently I am creating a new slot in my constructor with two for loops.

so it would be a good idea to save the slots in a slot array (maybe also in a two-dimensional array)?!

or is there a better way?

18 minutes ago, diesieben07 said:

Sync this, by sending a packet.

what kind of packet?

Draco18s · Thursday at 02:17 PM

2 minutes ago, Luis_ST said:

what kind of packet?

A custom one.

diesieben07 · Thursday at 02:29 PM

14 minutes ago, Luis_ST said:

so it would be a good idea to save the slots in a slot array (maybe also in a two-dimensional array)?!

Container#inventorySlots already exists.

Luis_ST · Thursday at 02:48 PM

31 minutes ago, Draco18s said:

A custom one.

okay thanks, i'll try this later, i need first a solution to the problem with repositioning the slots.

because I currently have no idea how to move the slots (I know how, but not how exactly, I'm thinking about how the methods should work that I want to use for this).

19 minutes ago, diesieben07 said:

Container#inventorySlots already exists.

would be a possibility but does not change the fact that every time the player uses the scrollbar I have to reposition 16 slots.

that's why i'm thinking about creating a slot group then i would only have to reposition two groups each time.

which would simplify the whole thing from my current point of view.

so every time I only have to check in which direction the bar was moved and then move the slot group in the same direction

1. is this a good solution / possible solution?

2. is there A better way to move many slots at once?

Edited Thursday at 02:48 PM by Luis_ST

diesieben07 · Thursday at 02:51 PM

No, to move a number of slots you need to move all of them. There is no shortcut. Simply write a for loop.

Luis_ST · Thursday at 04:29 PM

1 hour ago, diesieben07 said:

No, to move a number of slots you need to move all of them. There is no shortcut. Simply write a for loop.

okay i found a way.

one more question do I have to create my own slot because posX and poxY are final in the slot class.

so i can't edit them

diesieben07 · Thursday at 04:31 PM

You can do one of the following:

Make new Slot instances and replace the existing ones.
Set the fields using reflection.
Use an Access Transformer.

Luis_ST · Thursday at 04:33 PM

1 minute ago, diesieben07 said:

Make new Slot instances and replace the existing ones.

Set the fields using reflection.

Use an Access Transformer

i think it's easier to create my own slot

diesieben07 · Thursday at 04:33 PM

Just now, Luis_ST said:

i think it's easier to create my own slot

Making your own Slot class will not magically make the fields not final. You cannot override fields.

Luis_ST · Thursday at 04:35 PM

1 minute ago, diesieben07 said:

Making your own Slot class will not magically make the fields not final. You cannot override fields.

this is exactly the problem i just ran into. i try reflection

Luis_ST · Thursday at 04:42 PM

7 minutes ago, diesieben07 said:

Making your own Slot class will not magically make the fields not final. You cannot override fields.

this should be correct right?

	private static final Field yPos = ObfuscationReflectionHelper.findField(Slot.class, "field_75221_f");
	
	private static void setSlotPosY(Slot slot, int newPosY) {
		
		yPos.setAccessible(true);
		try {
			
			yPos.setInt(slot, newPosY);
			
		} catch (IllegalArgumentException | IllegalAccessException e) {
			
			e.printStackTrace();
			
		}
		
	}

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[1.16.5] Help with custom container (error when put a item in an slot)

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