Game crashing when the block is activated

[jun2040]

I'm trying to make a block that has a gui but every time I activate it, my game just crashes.

 

Code:

package com.jun2040.unixmod.blocks;

import com.jun2040.unixmod.UnixMod;
import com.mojang.blaze3d.platform.GlStateManager;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.screen.inventory.ContainerScreen;
import net.minecraft.entity.player.PlayerInventory;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.text.ITextComponent;

public class BioreactorScreen extends ContainerScreen<BioreactorContainer> {

    private ResourceLocation GUI = new ResourceLocation(UnixMod.MODID, "textures/gui/bioreactor.png");

    public BioreactorScreen(BioreactorContainer container, PlayerInventory inv, ITextComponent name) {
        super(container, inv, name);
    }

    @Override
    public void render(int mouseX, int mouseY, float partialTicks) {
        this.renderBackground();
        super.render(mouseX, mouseY, partialTicks);
        this.renderHoveredToolTip(mouseX, mouseY);
    }

    @Override
    protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {

    }

    @Override
    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {
        GlStateManager.color4f(1.0F, 1.0F, 1.0F, 1.0F);
        this.minecraft.getTextureManager().bindTexture(GUI);
        int relX = (this.width - this.xSize) / 2;
        int relY = (this.height - this.ySize) / 2;
        this.blit(relX, relY, 0, 0, this.xSize, this.ySize);
    }
}

 

Error:

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 12/12/19 11:18 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
    at com.jun2040.unixmod.blocks.BioreactorContainer.canInteractWith(BioreactorContainer.java:38) ~[?:?] {re:classloading}
    at net.minecraft.entity.player.ServerPlayerEntity.tick(ServerPlayerEntity.java:338) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.server.ServerWorld.updateEntity(ServerWorld.java:602) ~[?:?] {re:classloading}
    at net.minecraft.world.World.func_217390_a(World.java:736) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.world.server.ServerWorld.tick(ServerWorld.java:397) ~[?:?] {re:classloading}
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:800) ~[?:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:646) [?:?] {re:classloading,pl:accesstransformer:B}
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202] {}

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

-- Head --
Thread: Server thread
Stacktrace:
    at com.jun2040.unixmod.blocks.BioreactorContainer.canInteractWith(BioreactorContainer.java:38)
    at net.minecraft.entity.player.ServerPlayerEntity.tick(ServerPlayerEntity.java:338)
    at net.minecraft.world.server.ServerWorld.updateEntity(ServerWorld.java:602)

-- Entity being ticked --
Details:
    Entity Type: minecraft:player (net.minecraft.entity.player.ServerPlayerEntity)
    Entity ID: 126
    Entity Name: Dev
    Entity's Exact location: -149.92, 22.00, -45.12
    Entity's Block location: World: (-150,22,-46), Chunk: (at 10,1,2 in -10,-3; contains blocks -160,0,-48 to -145,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
    Entity's Momentum: 0.00, -0.08, 0.00
    Entity's Passengers: []
    Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
    at net.minecraft.world.World.func_217390_a(World.java:736)
    at net.minecraft.world.server.ServerWorld.tick(ServerWorld.java:397)

-- Affected level --
Details:
    All players: 1 total; [ServerPlayerEntity['Dev'/126, l='mod test', x=-149.92, y=22.00, z=-45.12]]
    Chunk stats: ServerChunkCache: 2246
    Level dimension: DimensionType{minecraft:overworld}
    Level name: mod test
    Level seed: -2385347844768643725
    Level generator: ID 01 - flat, ver 0. Features enabled: true
    Level generator options: {biome:"minecraft:plains",layers:[{block:"minecraft:bedrock",height:1b},{block:"minecraft:dirt",height:20b},{block:"minecraft:grass_block",height:1b}],structures:{village:{}}}
    Level spawn location: World: (-176,22,-112), Chunk: (at 0,1,0 in -11,-7; contains blocks -176,0,-112 to -161,255,-97), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
    Level time: 54794 game time, 3461 day time
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 36009 (now: false), thunder time: 52923 (now: false)
    Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
    at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:865)
    at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:800)
    at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:646)
    at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
    Minecraft Version: 1.14.4
    Minecraft Version ID: 1.14.4
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_202, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 535933160 bytes (511 MB) / 2076704768 bytes (1980 MB) up to 3771203584 bytes (3596 MB)
    CPUs: 12
    JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
    ModLauncher: 4.1.0+62+5bfa59b
    ModLauncher launch target: fmluserdevclient
    ModLauncher naming: mcp
    ModLauncher services: 
        /eventbus-1.0.0-service.jar eventbus PLUGINSERVICE 
        /forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-launcher.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-launcher.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-1.0.1-milestone.0.1+94458e7-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-launcher.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-launcher.jar runtimedistcleaner PLUGINSERVICE 
        /forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-launcher.jar fml TRANSFORMATIONSERVICE 
    FML: 28.1
    Forge: net.minecraftforge:28.1.87
    FML Language Providers: 
        javafml@28.1
        minecraft@1
    Mod List: 
        client-extra.jar Minecraft {minecraft@1.14.4 DONE}
        main UnixMod {unixmod@0.1 DONE}
        forge-1.14.4-28.1.87_mapped_snapshot_20191111-1.14.3-recomp.jar Forge {forge@28.1.87 DONE}
    Player Count: 1 / 8; [ServerPlayerEntity['Dev'/126, l='mod test', x=-149.92, y=22.00, z=-45.12]]
    Data Packs: vanilla, mod:unixmod, mod:forge
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'forge'

[Draco18s]

  On 12/12/2019 at 4:51 PM, jun2040 said:

(BioreactorContainer.java:38)

Expand  

^^^^^^^^^^^^^^^^^^^^^^^

The class              ^^^ Line number

 

Learn to read stack traces.

[jun2040]

Oops

Sorry. I was really sleepy last night.

Correct code:

package com.jun2040.unixmod.blocks;

import com.jun2040.unixmod.items.ModItems;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.entity.player.PlayerInventory;
import net.minecraft.inventory.container.Container;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.IWorldPosCallable;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;
import net.minecraftforge.items.wrapper.InvWrapper;

import static com.jun2040.unixmod.blocks.ModBlocks.BIOREACTOR_CONTAINER;

public class BioreactorContainer extends Container {

    private TileEntity tileEntity;
    private PlayerEntity playerEntity;
    private IItemHandler playerInventory;

    public BioreactorContainer(int windowId, World world, BlockPos pos, PlayerInventory playerInventory, PlayerEntity player) {
        super(BIOREACTOR_CONTAINER, windowId);
        TileEntity tileEntity = world.getTileEntity(pos);
        this.playerEntity = player;
        this.playerInventory = new InvWrapper(playerInventory);

        tileEntity.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY).ifPresent(h -> {
            addSlot(new SlotItemHandler(h, 0, 64, 24));
        });
        layoutPlayerInventorySlots(10, 70);
    }

    @Override
    public boolean canInteractWith(PlayerEntity playerIn) {
        return isWithinUsableDistance(IWorldPosCallable.of(tileEntity.getWorld(), tileEntity.getPos()), playerEntity, ModBlocks.BIOREACTOR);
    }

    private int addSlotRange(IItemHandler handler, int index, int x, int y, int amount, int dx) {
        for (int i = 0 ; i < amount ; i++) {
            addSlot(new SlotItemHandler(handler, index, x, y));
            x += dx;
            index++;
        }
        return index;
    }

    private int addSlotBox(IItemHandler handler, int index, int x, int y, int horAmount, int dx, int verAmount, int dy) {
        for (int j = 0 ; j < verAmount ; j++) {
            index = addSlotRange(handler, index, x, y, horAmount, dx);
            y += dy;
        }
        return index;
    }

    private void layoutPlayerInventorySlots(int leftCol, int topRow) {
        // Player inventory
        addSlotBox(playerInventory, 9, leftCol, topRow, 9, 18, 3, 18);

        // Hotbar
        topRow += 58;
        addSlotRange(playerInventory, 0, leftCol, topRow, 9, 18);
    }
}

[DavidM]

You never assigned a value to the tileEntity field.

[RaphGamingz]

  On 12/13/2019 at 3:48 AM, jun2040 said:

private TileEntity tileEntity;

Expand  

then you 

 

 

 

 

 

  On 12/13/2019 at 3:48 AM, jun2040 said:

TileEntity tileEntity = world.getTileEntity(pos);

Expand  

your not assigning a value to the tileEntity

try in the constructor

tileEntity = world.getTileEntity(pos);

[jun2040]

@RaphGamingz I did that but this time whenever I right click the block it says [16:35:22] [Client thread/WARN] [minecraft/ScreenManager]: Failed to create screen for menu type: unixmod:bioreactor

[jun2040]

I still can't fix it. Here's my whole mod: https://github.com/jun2040/unixmod