[1.10.2] Message to all players on server

[DarkProd02]

Hi all, 

I try to send a message to all players when a players do right-click on an item.

here is my code: 

package fr.darkprod.archymod.items;

import java.util.List;

import org.lwjgl.input.Keyboard;

import com.mojang.realmsclient.gui.ChatFormatting;
import com.mojang.realmsclient.util.Pair;

import fr.darkprod.archymod.ArchyMod;
import fr.darkprod.archymod.References;
import fr.darkprod.archymod.handlers.ArchydiumSoundHandler;
import fr.darkprod.archymod.init.ModBlocks;
import net.minecraft.block.Block;
import net.minecraft.block.state.IBlockState;
import net.minecraft.client.Minecraft;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.init.Blocks;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.ActionResult;
import net.minecraft.util.EnumActionResult;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.FMLCommonHandler;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.ItemHandlerHelper;
import scala.util.Random;

public class PremiumLeather extends Item {
	public PremiumLeather(String name) {
		
		this.setRegistryName(name);
		this.setUnlocalizedName(name);
		this.setCreativeTab(ArchyMod.ArchyMod);
	}

	@Override
	public ActionResult<ItemStack> onItemRightClick(ItemStack itemStackIn, World worldIn, EntityPlayer playerIn,EnumHand hand) {
		
		if (playerIn.capabilities.isCreativeMode) {
				
			if (worldIn.isRemote) {
				
			
			Random randomX = new Random();
			int maxX = 200;
			int minX = 1;
			int randomX1 = randomX.nextInt((maxX - minX) + 1);//random number from 1 to 100.
			
			Random randomY = new Random();
			int maxY = 200;
			int minY = 1;
			int randomY1 = randomY.nextInt((maxY - minY) + 1);//random number from 1 to 100.
			
			Random randomZ = new Random();
			int maxZ = 200;
			int minZ = 1;
			int randomZ1 = randomZ.nextInt((maxZ - minZ) + 1);//random number from 1 to 100.
			
			Block block = ModBlocks.ArchydiumBlock;
			BlockPos blockPos = new BlockPos(randomX1,randomY1-1,randomZ1);
			IBlockState blockState = block.getDefaultState();
			worldIn.setBlockState(blockPos,blockState);
			
			/*Block block2 = Blocks.STONE;
			BlockPos blockPos2 = new BlockPos(randomX1,randomY1-2,randomZ1);
			IBlockState blockState2 = block2.getDefaultState();
			worldIn.setBlockState(blockPos2,blockState2);*/
			
			FMLCommonHandler.instance().getMinecraftServerInstance().getServer().getPlayerList().sendChatMsg(new TextComponentString("Test"));
			
			if (playerIn instanceof EntityPlayer) {
				
			}
			worldIn.playSound(playerIn, randomX1, randomY1, randomZ1, ArchydiumSoundHandler.music, SoundCategory.RECORDS, 1.0F, 1.0F);
			
			}else {
				
			}
		}else {
			playerIn.addChatMessage(new TextComponentString(ChatFormatting.RED+"Vous devez etre en mode creatif pour faire un right-click et lancer la musique!"));
		}
		return new ActionResult<ItemStack>(EnumActionResult.SUCCESS, itemStackIn);
	}
	
	@Override
	public void addInformation(ItemStack stack, EntityPlayer playerIn, List<String> tooltip, boolean advanced) {
		
		String ifOpen = ""+ ChatFormatting.GOLD + ChatFormatting.ITALIC + "Right-Click on this item to Play Music ";
		
		if (Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)){
			tooltip.remove(References.HoldShift);
			tooltip.add(ifOpen);
		}else {
			tooltip.remove(ifOpen);
			tooltip.add(References.HoldShift);
		}
	}
}

and here is the error : 

  Quote

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 12/06/18 18:25
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
    at fr.darkprod.archymod.items.PremiumLeather.onItemRightClick(PremiumLeather.java:80)
    at net.minecraft.item.ItemStack.useItemRightClick(ItemStack.java:179)
    at net.minecraft.client.multiplayer.PlayerControllerMP.processRightClick(PlayerControllerMP.java:527)
    at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1629)
    at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2281)
    at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2058)
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:1846)
    at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1118)
    at net.minecraft.client.Minecraft.run(Minecraft.java:406)
    at net.minecraft.client.main.Main.main(Main.java:118)
    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 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.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 --
Thread: Client thread
Stacktrace:
    at fr.darkprod.archymod.items.PremiumLeather.onItemRightClick(PremiumLeather.java:80)
    at net.minecraft.item.ItemStack.useItemRightClick(ItemStack.java:179)
    at net.minecraft.client.multiplayer.PlayerControllerMP.processRightClick(PlayerControllerMP.java:527)
    at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1629)
    at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2281)
    at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2058)

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [EntityPlayerSP['Player545'/212, l='MpServer', x=-4,70, y=4,00, z=-4,70]]
    Chunk stats: MultiplayerChunkCache: 441, 441
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options: 
    Level spawn location: World: (0,63,0), Chunk: (at 0,3,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 14362 game time, 14362 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: survival (ID 0). Hardcore: false. Cheats: false
    Forced entities: 9 total; [EntityPlayerSP['Player545'/212, l='MpServer', x=-4,70, y=4,00, z=-4,70], EntityItem['item.item.dyePowder.black'/85, l='MpServer', x=-0,22, y=4,00, z=39,78], EntityRabbit['Rabbit'/119, l='MpServer', x=66,50, y=70,00, z=10,50], EntityRabbit['Rabbit'/120, l='MpServer', x=69,32, y=70,00, z=10,56], EntitySkeleton['Skeleton'/329, l='MpServer', x=4,50, y=4,00, z=-4,50], EntitySkeleton['Skeleton'/363, l='MpServer', x=3,50, y=13,00, z=1,50], EntitySkeleton['Skeleton'/286, l='MpServer', x=1,50, y=13,00, z=2,50], EntitySkeleton['Skeleton'/302, l='MpServer', x=4,50, y=12,00, z=0,50], EntityBat['Bat'/350, l='MpServer', x=3,22, y=15,21, z=-0,85]]
    Retry entities: 0 total; []
    Server brand: fml,forge
    Server type: Non-integrated multiplayer server
Stacktrace:
    at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:456)
    at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2779)
    at net.minecraft.client.Minecraft.run(Minecraft.java:435)
    at net.minecraft.client.main.Main.main(Main.java:118)
    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 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.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
    at GradleStart.main(GradleStart.java:26)

-- System Details --
Details:
    Minecraft Version: 1.10.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_171, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 703572312 bytes (670 MB) / 1038876672 bytes (990 MB) up to 2062286848 bytes (1966 MB)
    JVM Flags: 3 total; -Xincgc -Xmx2000M -Xms1024M
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    FML: MCP 9.32 Powered by Forge 12.18.3.2185 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
    UCHIJAAAAAA    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UCHIJAAAAAA    FML{8.0.99.99} [Forge Mod Loader] (forgeSrc-1.10.2-12.18.3.2185.jar) 
    UCHIJAAAAAA    Forge{12.18.3.2185} [Minecraft Forge] (forgeSrc-1.10.2-12.18.3.2185.jar) 
    UCHIJAAAAAA    cjcore{0.0.3.2} [CJCore] (cjcore-1.10-0.0.3.2.jar) 
    UCHIJAAAAAA    archydium{4.1} [Archymod] (bin) 
    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'Intel' Version: '4.0.0 - Build 10.18.10.4885' Renderer: 'Intel(R) HD Graphics 4000'
    Launched Version: 1.10.2
    LWJGL: 2.9.4
    OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 10.18.10.4885, 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)
    CPU: 4x Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz

Expand  

Thnx :)

[Draco18s]

  On 6/12/2018 at 4:35 PM, DarkProd02 said:

FMLCommonHandler.instance().getMinecraftServerInstance().getServer().getPlayerList().sendChatMsg(new TextComponentString("Test"));

Expand  

You can't do this on the client.

Edited June 12, 2018 by Draco18s

[DarkProd02]

So how i can do to send a message to all players?

 

[Draco18s]

You need to send a packet to the server and the server sends a message to all players.

 

  On 6/12/2018 at 4:35 PM, DarkProd02 said:

worldIn.setBlockState(blockPos,blockState);

Expand  

 

Which is true for setting the blockstate, too.

Edited June 12, 2018 by Draco18s

[Draco18s]

  On 6/12/2018 at 5:56 PM, diesieben07 said:

No. Look at the context please...

Expand  

You are correct, that method already runs on the server.

I was being hasty.

Still, it must happen on the server.

[DarkProd02]

okay thx but do you have the code plz?

[DarkProd02]

So what i need to Do With sides? 

[DarkProd02]

Yes of course but on the server an item. Can't be right clicked 

Edited June 15, 2018 by DarkProd02

[DarkProd02]

On the server a player can't do a right click on an item, he can do that only on client side

[DarkProd02]

Okay and how u can do that?