TunaFish2K

It display : ---- Minecraft Crash Report ---- // I bet Cylons wouldn't have this problem. Time: 6/12/21 6:24 PM Description: Initializing game java.lang.NullPointerException: Can't use a null-name for the registry, object space.tunafish2k.utech.item.ItemUPiece@19f811a2. at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:864) at net.minecraftforge.registries.ForgeRegistry.add(ForgeRegistry.java:294) at net.minecraftforge.registries.ForgeRegistry.add(ForgeRegistry.java:288) at net.minecraftforge.registries.ForgeRegistry.register(ForgeRegistry.java:120) at space.tunafish2k.utech.item.ItemRegisterHandler.onRegistery(ItemRegisterHandler.java:15) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_4_ItemRegisterHandler_onRegistery_Register.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus$1.invoke(EventBus.java:144) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) at net.minecraftforge.registries.GameData.fireRegistryEvents(GameData.java:852) at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:630) at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252) at net.minecraft.client.Minecraft.init(Minecraft.java:467) at net.minecraft.client.Minecraft.run(Minecraft.java:378) at net.minecraft.client.main.Main.main(Main.java:118) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at net.minecraftforge.legacydev.Main.start(Main.java:86) at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Client thread Stacktrace: at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:864) at net.minecraftforge.registries.ForgeRegistry.add(ForgeRegistry.java:294) at net.minecraftforge.registries.ForgeRegistry.add(ForgeRegistry.java:288) at net.minecraftforge.registries.ForgeRegistry.register(ForgeRegistry.java:120) at space.tunafish2k.utech.item.ItemRegisterHandler.onRegistery(ItemRegisterHandler.java:15) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_4_ItemRegisterHandler_onRegistery_Register.invoke(.dynamic) at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) at net.minecraftforge.fml.common.eventhandler.EventBus$1.invoke(EventBus.java:144) at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) at net.minecraftforge.registries.GameData.fireRegistryEvents(GameData.java:852) at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:630) at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:252) at net.minecraft.client.Minecraft.init(Minecraft.java:467) -- Initialization -- Details: Stacktrace: at net.minecraft.client.Minecraft.run(Minecraft.java:378) at net.minecraft.client.main.Main.main(Main.java:118) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at net.minecraftforge.legacydev.Main.start(Main.java:86) at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29) -- System Details -- Details: Minecraft Version: 1.12.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_291, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 287538248 bytes (274 MB) / 974651392 bytes (929 MB) up to 3787980800 bytes (3612 MB) JVM Flags: 0 total; IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 FML: MCP 9.42 Powered by Forge 14.23.5.2855 5 mods loaded, 5 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored | State | ID | Version | Source | Signature | |:----- |:--------- |:------------ |:------------------------------------------------------------------ |:--------- | | LCH | minecraft | 1.12.2 | minecraft.jar | None | | LCH | mcp | 9.42 | minecraft.jar | None | | LCH | FML | 8.0.99.99 | forge-1.12.2-14.23.5.2855_mapped_snapshot_20171003-1.12-recomp.jar | None | | LCH | forge | 14.23.5.2855 | forge-1.12.2-14.23.5.2855_mapped_snapshot_20171003-1.12-recomp.jar | None | | LCH | u_tech | 1.0 | main | None | Loaded coremods (and transformers): GL info: ' Vendor: 'Intel' Version: '4.6.0 - Build 27.20.100.8729' Renderer: 'Intel(R) UHD Graphics' Launched Version: ${MC_VERSION} LWJGL: 2.9.4 OpenGL: Intel(R) UHD Graphics GL version 4.6.0 - Build 27.20.100.8729, 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: 简体中文 (中国) Profiler Position: N/A (disabled) CPU: 16x Intel(R) Core(TM) i7-10875H CPU @ 2.30GHz Here are my codes: ItemUPiece.java: package space.tunafish2k.utech.item; import net.minecraft.item.Item; import space.tunafish2k.utech.UTech; public class ItemUPiece extends Item { public void ItemUpiece() { this.setUnlocalizedName(UTech.MODID + ".u_piece"); this.setRegistryName("u_tech","u_piece"); this.setMaxStackSize(64); } } ItemRegiserHandler: package space.tunafish2k.utech.item; import net.minecraft.item.Item; import net.minecraftforge.event.RegistryEvent; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.fml.common.eventhandler.SubscribeEvent; import net.minecraftforge.registries.IForgeRegistry; @Mod.EventBusSubscriber public class ItemRegisterHandler { public static final ItemUPiece U_PIECE = new ItemUPiece(); @SubscribeEvent public static void onRegistery(RegistryEvent.Register<Item> event) { IForgeRegistry<Item> registry = event.getRegistry(); registry.register(U_PIECE); } } crash-2021-06-12_18.24.20-client.txt

I wonder how to create a sword that have more damage to entities.