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Issues when registering ItemBlock


Womas
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I created a class called ModBlocks for my blocks. There are two blocks, arock and brock.

As you can see I created a method called registerBlocks() to register my blocks and also their ItemBlocks. And finally, use the register() method to register all of them in my main class.

But the following exception occurs:

package Sixs.FirstMod.blocks;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.item.ItemBlock;
import net.minecraftforge.fml.common.registry.GameRegistry;

public class ModBlocks {
    public static Block arock = new Block(Material.rock).setUnlocalizedName("arock").setRegistryName("arock");
    public static Block brock = new Block(Material.rock).setUnlocalizedName("brock").setRegistryName("brock");


    public static void init() {

    }

    public static void register() {
        registerBlocks(arock,brock);

    }

    public static void registerBlocks(Block... blocks) {
        for (Block block1 : blocks) {
            GameRegistry.registerBlock(block1);
            ItemBlock itemBlock = new ItemBlock(block1);
            itemBlock.setRegistryName(block1.getRegistryName());
            GameRegistry.registerItem(itemBlock);
        }

    }
}

 
 
0
 Advanced issues found
 
 
 
Spoiler

[16:50:37] [Client thread/ERROR] [FML]: The following problems were captured during this phase
[16:50:37] [Client thread/ERROR] [FML]: Caught exception from fm
java.lang.IllegalArgumentException: The name fm:arock has been registered twice, for net.minecraft.item.ItemBlock@5599d304 and net.minecraft.item.ItemBlock@7738b226.
    at net.minecraftforge.fml.common.registry.FMLControlledNamespacedRegistry.add(FMLControlledNamespacedRegistry.java:455) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at net.minecraftforge.fml.common.registry.GameData.registerItem(GameData.java:120) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:152) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:137) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at Sixs.FirstMod.blocks.ModBlocks.registerBlocks(ModBlocks.java:27) ~[FirstMod.main/:?]
    at Sixs.FirstMod.blocks.ModBlocks.register(ModBlocks.java:18) ~[FirstMod.main/:?]
    at Sixs.FirstMod.FirstMod.preInit(FirstMod.java:32) ~[FirstMod.main/:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_211]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_211]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_211]
    at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_211]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_211]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_211]
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?]
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189) ~[forgeSrc-1.8.9-11.15.1.1722.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_211]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_211]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_211]
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?]
    at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?]
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118) [LoadController.class:?]
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:556) [Loader.class:?]
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243) [FMLClientHandler.class:?]
    at net.minecraft.client.Minecraft.startGame(Minecraft.java:451) [Minecraft.class:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:360) [Minecraft.class:?]
    at net.minecraft.client.main.Main.main(Main.java:116) [Main.class:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_211]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_211]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_211]
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_211]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_211]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_211]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_211]
    at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
    at GradleStart.main(GradleStart.java:26) [start/:?]
[16:50:37] [Client thread/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:612]: ---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 7/29/19 4:50 PM
Description: Initializing game

java.lang.IllegalArgumentException: The name fm:arock has been registered twice, for net.minecraft.item.ItemBlock@5599d304 and net.minecraft.item.ItemBlock@7738b226.
    at net.minecraftforge.fml.common.registry.FMLControlledNamespacedRegistry.add(FMLControlledNamespacedRegistry.java:455)
    at net.minecraftforge.fml.common.registry.GameData.registerItem(GameData.java:120)
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:152)
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:137)
    at Sixs.FirstMod.blocks.ModBlocks.registerBlocks(ModBlocks.java:27)
    at Sixs.FirstMod.blocks.ModBlocks.register(ModBlocks.java:18)
    at Sixs.FirstMod.FirstMod.preInit(FirstMod.java:32)
    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.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560)
    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 com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
    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 com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:556)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
    at net.minecraft.client.Minecraft.startGame(Minecraft.java:451)
    at net.minecraft.client.Minecraft.run(Minecraft.java:360)
    at net.minecraft.client.main.Main.main(Main.java:116)
    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.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
    at GradleStart.main(GradleStart.java:26)


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

-- Head --
Stacktrace:
    at net.minecraftforge.fml.common.registry.FMLControlledNamespacedRegistry.add(FMLControlledNamespacedRegistry.java:455)
    at net.minecraftforge.fml.common.registry.GameData.registerItem(GameData.java:120)
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:152)
    at net.minecraftforge.fml.common.registry.GameRegistry.registerItem(GameRegistry.java:137)
    at Sixs.FirstMod.blocks.ModBlocks.registerBlocks(ModBlocks.java:27)
    at Sixs.FirstMod.blocks.ModBlocks.register(ModBlocks.java:18)
    at Sixs.FirstMod.FirstMod.preInit(FirstMod.java:32)
    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.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560)
    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 com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
    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 com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:556)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
    at net.minecraft.client.Minecraft.startGame(Minecraft.java:451)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.run(Minecraft.java:360)
    at net.minecraft.client.main.Main.main(Main.java:116)
    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.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
    at GradleStart.main(GradleStart.java:26)

It says that I use the name fm:arock to register ItemBlocks twice, but I don't know how. The ItemBlocks's registry names are the same from their corresponding blocks.

Help will be appreciated.

Edited by Womas

Learning forge modding right now!

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