Hey im trying to place a different block depending on the different nbt's but it crashes.

Method:

 

public boolean onItemUse(ItemStack itemstack, EntityPlayer player, World world, BlockPos pos, EnumFacing side, float hitX, float hitY, float hitZ) {

if (player.isSneaking()) {

itemstack.getTagCompound().setString("effect", "No effect");

} else if (player.canPlayerEdit(pos.up(), side, itemstack)) {

 

if (itemstack.getTagCompound().getString("effect") == "Toxic") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestToxic.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

if (itemstack.getTagCompound().getString("effect") == "InvertedVision") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestInvertedVision.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

if (itemstack.getTagCompound().getString("effect") == "BlurredVision") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestBlurredVision.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

if (itemstack.getTagCompound().getString("effect") == "XPDrain") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestXPDrain.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

if (itemstack.getTagCompound().getString("effect") == "Rooted") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestRooted.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

if (itemstack.getTagCompound().getString("effect") == "Diarrhea") {

world.setBlockState(pos.up(+1), BioWarfareBlocks.block_BacteriaTestDiarrhea.getDefaultState(), 3);

 

--itemstack.stackSize;

return true;

}

 

}

return false;

 

}

show the crash and use code tags please

[20:07:10] [Netty Local Client IO #0/INFO] [FML]: Server protocol version 1

[20:07:10] [Netty Server IO #1/INFO] [FML]: Client protocol version 1

[20:07:10] [Netty Server IO #1/INFO] [FML]: Client attempting to join with 4 mods : [email protected],[email protected],[email protected],[email protected]

[20:07:10] [Netty Local Client IO #0/INFO] [FML]: [Netty Local Client IO #0] Client side modded connection established

[20:07:10] [server thread/INFO] [FML]: [server thread] Server side modded connection established

[20:07:10] [server thread/INFO]: Player924[local:E:f6e82718] logged in with entity id 392 at (7.484981286012351, 70.30318144372347, -61.335787954741555)

[20:07:10] [server thread/INFO]: Player924 joined the game

[20:07:13] [server thread/FATAL] [FML]: Exception caught executing FutureTask: java.util.concurrent.ExecutionException: java.lang.NullPointerException

java.util.concurrent.ExecutionException: java.lang.NullPointerException

at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.7.0_51]

at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.7.0_51]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:710) [FMLCommonHandler.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:726) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540) [MinecraftServer.class:?]

at java.lang.Thread.run(Unknown Source) [?:1.7.0_51]

Caused by: java.lang.NullPointerException

at com.looke81.biowarfare.items.ContainedUnknownPathogen.onItemUse(ContainedUnknownPathogen.java:35) ~[ContainedUnknownPathogen.class:?]

at net.minecraftforge.common.ForgeHooks.onPlaceItemIntoWorld(ForgeHooks.java:570) ~[ForgeHooks.class:?]

at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:146) ~[itemStack.class:?]

at net.minecraft.server.management.ItemInWorldManager.activateBlockOrUseItem(ItemInWorldManager.java:488) ~[itemInWorldManager.class:?]

at net.minecraft.network.NetHandlerPlayServer.processPlayerBlockPlacement(NetHandlerPlayServer.java:624) ~[NetHandlerPlayServer.class:?]

at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.processPacket(C08PacketPlayerBlockPlacement.java:67) ~[C08PacketPlayerBlockPlacement.class:?]

at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.processPacket(C08PacketPlayerBlockPlacement.java:114) ~[C08PacketPlayerBlockPlacement.class:?]

at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:24) ~[PacketThreadUtil$1.class:?]

at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.7.0_51]

at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.7.0_51]

at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:709) ~[FMLCommonHandler.class:?]

... 5 more

[20:07:13] [server thread/INFO]: Stopping server

[20:07:13] [server thread/INFO]: Saving players

[20:07:13] [server thread/INFO]: Saving worlds

[20:07:13] [server thread/INFO]: Saving chunks for level 'BioWarfare Test World #1'/Overworld

[20:07:13] [server thread/INFO]: Saving chunks for level 'BioWarfare Test World #1'/Nether

[20:07:13] [server thread/INFO]: Saving chunks for level 'BioWarfare Test World #1'/The End

[20:07:14] [server thread/INFO] [FML]: Unloading dimension 0

[20:07:14] [server thread/INFO] [FML]: Unloading dimension -1

[20:07:14] [server thread/INFO] [FML]: Unloading dimension 1

[20:07:14] [server thread/INFO] [FML]: Applying holder lookups

[20:07:14] [server thread/INFO] [FML]: Holder lookups applied

[20:07:14] [Client thread/FATAL]: Unreported exception thrown!

java.lang.NullPointerException

at com.looke81.biowarfare.items.ContainedUnknownPathogen.onItemUse(ContainedUnknownPathogen.java:35) ~[ContainedUnknownPathogen.class:?]

at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:147) ~[itemStack.class:?]

at net.minecraft.client.multiplayer.PlayerControllerMP.func_178890_a(PlayerControllerMP.java:442) ~[PlayerControllerMP.class:?]

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1564) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.runTick(Minecraft.java:2123) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1080) ~[Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:376) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:117) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_51]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_51]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_51]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_51]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]

at GradleStart.main(Unknown Source) [start/:?]

[20:07:14] [Client thread/INFO] [sTDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:660]: ---- Minecraft Crash Report ----

// I just don't know what went wrong

 

Time: 12/06/15 20:07

Description: Unexpected error

 

java.lang.NullPointerException: Unexpected error

at com.looke81.biowarfare.items.ContainedUnknownPathogen.onItemUse(ContainedUnknownPathogen.java:35)

at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:147)

at net.minecraft.client.multiplayer.PlayerControllerMP.func_178890_a(PlayerControllerMP.java:442)

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1564)

at net.minecraft.client.Minecraft.runTick(Minecraft.java:2123)

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1080)

at net.minecraft.client.Minecraft.run(Minecraft.java:376)

at net.minecraft.client.main.Main.main(Main.java:117)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)

at GradleStart.main(Unknown Source)

 

 

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

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at com.looke81.biowarfare.items.ContainedUnknownPathogen.onItemUse(ContainedUnknownPathogen.java:35)

at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:147)

at net.minecraft.client.multiplayer.PlayerControllerMP.func_178890_a(PlayerControllerMP.java:442)

at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1564)

 

-- Affected level --

Details:

Level name: MpServer

All players: 1 total; [EntityPlayerSP['Player924'/392, l='MpServer', x=7.48, y=70.30, z=-61.34]]

Chunk stats: MultiplayerChunkCache: 25, 25

Level seed: 0

Level generator: ID 00 - default, ver 1. Features enabled: false

Level generator options:

Level spawn location: -148.00,64.00,236.00 - World: (-148,64,236), Chunk: (at 12,4,12 in -10,14; contains blocks -160,0,224 to -145,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)

Level time: 243876 game time, 74480 day time

Level dimension: 0

Level storage version: 0x00000 - Unknown?

Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)

Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false

Forced entities: 34 total; [EntityRabbit['Rabbit'/410, l='MpServer', x=49.19, y=64.02, z=-79.59], EntityCow['Cow'/411, l='MpServer', x=22.64, y=69.00, z=-26.46], EntitySquid['Squid'/408, l='MpServer', x=-22.53, y=61.63, z=-73.57], EntitySquid['Squid'/409, l='MpServer', x=-15.66, y=60.30, z=-74.49], EntityCow['Cow'/414, l='MpServer', x=12.84, y=68.00, z=-111.59], EntityCow['Cow'/415, l='MpServer', x=15.94, y=69.00, z=-96.06], EntityCow['Cow'/412, l='MpServer', x=-31.84, y=63.00, z=-29.34], EntityCow['Cow'/413, l='MpServer', x=-42.34, y=65.00, z=-51.56], EntityCow['Cow'/402, l='MpServer', x=8.09, y=70.00, z=-20.81], EntityRabbit['Rabbit'/403, l='MpServer', x=-12.53, y=69.00, z=-19.13], EntityCow['Cow'/400, l='MpServer', x=34.59, y=68.00, z=-48.66], EntitySheep['Sheep'/401, l='MpServer', x=33.31, y=66.00, z=-61.88], EntitySquid['Squid'/406, l='MpServer', x=-21.69, y=61.59, z=-72.27], EntitySquid['Squid'/407, l='MpServer', x=-26.52, y=62.00, z=-66.57], EntityCow['Cow'/404, l='MpServer', x=-28.78, y=63.00, z=-47.69], EntityCow['Cow'/405, l='MpServer', x=-20.13, y=67.00, z=-45.41], EntityPlayerSP['Player924'/392, l='MpServer', x=7.48, y=70.30, z=-61.34], EntityRabbit['Rabbit'/394, l='MpServer', x=9.20, y=70.19, z=-59.32], EntityCow['Cow'/393, l='MpServer', x=11.84, y=70.00, z=-52.97], EntityCow['Cow'/399, l='MpServer', x=1.81, y=67.00, z=-83.59], EntitySheep['Sheep'/398, l='MpServer', x=0.44, y=64.00, z=-94.97], EntityCow['Cow'/397, l='MpServer', x=-2.69, y=69.00, z=-62.36], EntityCow['Cow'/396, l='MpServer', x=-10.63, y=69.00, z=-67.81], EntityCreeper['Creeper'/425, l='MpServer', x=62.91, y=54.00, z=-110.56], EntityCow['Cow'/424, l='MpServer', x=-32.47, y=65.00, z=-83.77], EntityCow['Cow'/426, l='MpServer', x=57.09, y=67.00, z=-108.81], EntityCreeper['Creeper'/417, l='MpServer', x=-46.44, y=13.00, z=-73.59], EntitySkeleton['Skeleton'/416, l='MpServer', x=-44.50, y=13.00, z=-68.50], EntitySheep['Sheep'/419, l='MpServer', x=17.47, y=69.00, z=-104.50], EntityCow['Cow'/418, l='MpServer', x=-34.28, y=68.00, z=-77.47], EntitySheep['Sheep'/421, l='MpServer', x=49.13, y=71.00, z=-71.97], EntityCow['Cow'/420, l='MpServer', x=29.16, y=71.00, z=-104.84], EntityZombie['Zombie'/423, l='MpServer', x=-40.06, y=30.00, z=-92.72], EntityCow['Cow'/422, l='MpServer', x=51.59, y=65.00, z=-79.78]]

Retry entities: 0 total; []

Server brand: fml,forge

Server type: Integrated singleplayer server

Stacktrace:

at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:392)

at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2600)

at net.minecraft.client.Minecraft.run(Minecraft.java:405)

at net.minecraft.client.main.Main.main(Main.java:117)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source)

at GradleStart.main(Unknown Source)

 

-- System Details --

Details:

Minecraft Version: 1.8

Operating System: Windows 7 (amd64) version 6.1

Java Version: 1.7.0_51, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 756718192 bytes (721 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)

JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M

IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95

FML: MCP v9.10 FML v8.0.37.1334 Minecraft Forge 11.14.1.1334 4 mods loaded, 4 mods active

mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

FML{8.0.37.1334} [Forge Mod Loader] (forgeSrc-1.8-11.14.1.1334.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Forge{11.14.1.1334} [Minecraft Forge] (forgeSrc-1.8-11.14.1.1334.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

biowarfare{1.0} [bioWarfare] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available

Loaded coremods (and transformers):

Launched Version: 1.8

LWJGL: 2.9.1

OpenGL: Intel® HD Graphics 2000 GL version 3.1.0 - Build 9.17.10.3517, Intel

GL Caps: Using GL 1.3 multitexturing.

Using GL 1.3 texture combiners.

Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.

Shaders are available because OpenGL 2.1 is supported.

VBOs are available because OpenGL 1.5 is supported.

 

Using VBOs: Yes

Is Modded: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Resource Packs: []

Current Language: English (US)

Profiler Position: N/A (disabled)

[20:07:14] [Client thread/INFO] [sTDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:660]: #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Daniel\Desktop\BioWarfare 1.8\eclipse\.\crash-reports\crash-2015-06-12_20.07.14-client.txt

AL lib: (EE) alc_cleanup: 1 device not closed

 

getString("effect") == "Toxic"

That is not how you compare strings.

 

== is comprasion of 2 objects.

 

you need to use string.equals()

 

EDIT

Also - after decrementing stack's size you need to MANUALLY check if its == 0 and set stack to null (from player.inventory level).