I've been using:

 

EntityPlayer player = (EntityPlayer)event.entity;

or:    EntityPlayer player = Minecraft.getMinecraft().thePlayer;

 

in my code, but when I try to test it on a server, I get an error on this line in my main class:

 

public static final KeyHandlerEvents keyBinding = new KeyHandlerEvents();

 

saying:      java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityClientPlayerMP

 

The content of that class is in the spoiler at the bottom.

 

The rest of the error is here if it matters:

 

 

[18:43:16] [server thread/ERROR]: Encountered an unexpected exception

java.lang.NoClassDefFoundError: net/minecraft/client/entity/EntityClientPlayerMP

at com.fandomcraft.main.Main.<clinit>(Main.java:198) ~[Main.class:?]

at java.lang.Class.forName0(Native Method) ~[?:1.7.0_51]

at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_51]

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:420) ~[FMLModContainer.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 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 cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208) ~[LoadController.class:?]

at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187) ~[LoadController.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 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 cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118) ~[LoadController.class:?]

at cpw.mods.fml.common.Loader.loadMods(Loader.java:492) ~[Loader.class:?]

at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87) ~[FMLServerHandler.class:?]

at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:313) ~[FMLCommonHandler.class:?]

at net.minecraft.server.dedicated.DedicatedServer.startServer(DedicatedServer.java:120) ~[DedicatedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:455) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:762) [MinecraftServer$2.class:?]

Caused by: java.lang.ClassNotFoundException: net.minecraft.client.entity.EntityClientPlayerMP

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188) ~[launchwrapper-1.9.jar:?]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]

... 31 more

Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/entity/EntityClientPlayerMP for invalid side SERVER

at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50) ~[forgeSrc-1.7.10-10.13.0.1180.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:276) ~[launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:174) ~[launchwrapper-1.9.jar:?]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]

at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]

... 31 more

[18:43:16] [server thread/ERROR]: This crash report has been saved to: C:\Users\Erika\Desktop\FandomCraft\eclipse\.\crash-reports\crash-2014-09-14_18.43.16-server.txt

[18:43:16] [server thread/WARN] [FML]: Can't revert to frozen GameData state without freezing first.

[18:43:16] [server thread/INFO] [FML]: Applying holder lookups

[18:43:16] [server thread/INFO] [FML]: Holder lookups applied

[18:43:16] [server thread/INFO] [FML]: The state engine was in incorrect state ERRORED and forced into state SERVER_STOPPED. Errors may have been discarded.

[18:43:16] [server thread/INFO] [FML]: The state engine was in incorrect state ERRORED and forced into state AVAILABLE. Errors may have been discarded.

 

 

Before I added anything that uses EntityPlayer player = (EntityPlayer)event.entity; or EntityPlayer player = Minecraft.getMinecraft().thePlayer; it worked fine on servers, and in single player it works perfectly fine as it is now, so how exactly do I reference the player on a server if not either of those?

 

The class it's pointing at now is this if someone needs to see the whole thing. There's probably other places, but I can't check until this one passes startup:

 

package com.fandomcraft.events;

import java.util.Random;

import net.minecraft.client.Minecraft;
import net.minecraft.client.entity.EntityClientPlayerMP;
import net.minecraft.client.gui.GuiChat;
import net.minecraft.client.settings.KeyBinding;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.ChatComponentText;
import net.minecraft.util.ChunkCoordinates;
import net.minecraft.util.DamageSource;
import net.minecraft.world.World;
import net.minecraft.world.WorldServer;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.living.EnderTeleportEvent;

import org.lwjgl.input.Keyboard;

import com.fandomcraft.entity.EntityEnergyBall;
import com.fandomcraft.main.Main;
import com.fandomcraft.zelda.Oocoo;

import cpw.mods.fml.client.FMLClientHandler;
import cpw.mods.fml.client.registry.ClientRegistry;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.InputEvent;

public class KeyHandlerEvents
{
public static final String ocarina = "keybinds.ocarina";
public static final int key6 = Keyboard.KEY_NUMPAD7 ;
public final KeyBinding bind6;

public KeyHandlerEvents()
{
	super();
	bind6 = new KeyBinding("keybinds.ocarina.time", key6, ocarina);
	ClientRegistry.registerKeyBinding(bind6);
}

@SubscribeEvent
public void checkKeybind(InputEvent.KeyInputEvent event)
{
	EntityPlayer player = Minecraft.getMinecraft().thePlayer;
	if (!FMLClientHandler.instance().isGUIOpen(GuiChat.class))
	{
		if (bind6.isPressed())
		{
			World world = player.getEntityWorld();

            	if(player.inventory.getCurrentItem() !=null && player.inventory.getCurrentItem().getItem() == Main.ocarina && player.inventory.hasItem(Main.song7))
            	{
               				player.playSound("fandomcraft:ocarina.timeSong", 1F, 1F);
               				String time = keepTime(world);
               				player.addChatMessage(new ChatComponentText("The time " + time + "."));
           		}
   				else
   				{
   					player.addChatMessage(new ChatComponentText("You can't play that song unless you have the song page and are holding the Ocarina."));
   				}
		}
	}
}

public int ticks;
public String keepTime(World world)
{
	ticks = (int) world.getWorldTime();
	if(ticks <= 1000)
	{
		return "is approximately 6:00 AM";
	}
	if(ticks > 1000 && ticks <= 2000)
	{
		return "is approximately 7:00 AM";
	}
	if(ticks > 2000 && ticks <= 3000)
	{
		return "is approximately 8:00 AM";
	}
	if(ticks > 3000 && ticks <= 4000)
	{
		return "is approximately 9:00 AM";
	}
	if(ticks > 4000 && ticks <= 5000)
	{
		return "is approximately 10:00 AM";
	}
	if(ticks > 5000 && ticks <= 6000)
	{
		return "is approximately 11:00 AM";
	}
	if(ticks > 6000 && ticks <= 7000)
	{
		return "is approximately 12:00 PM";
	}
	if(ticks > 7000 && ticks <= 8000)
	{
		return "is approximately 1:00 AM";
	}
	if(ticks > 8000 && ticks <= 9000)
	{
		return "is approximately 2:00 PM";
	}
	if(ticks > 9000 && ticks <= 10000)
	{
		return "is approximately 3:00 PM";
	}
	if(ticks > 10000 && ticks <= 11000)
	{
		return "is approximately 4:00 PM";
	}
	if(ticks > 11000 && ticks <= 12000)
	{
		return "is approximately 5:00 PM";
	}
	if(ticks > 12000 && ticks <= 13000)
	{
		return "is approximately 6:00 PM";
	}
	if(ticks > 13000 && ticks <= 14000)
	{
		return "is approximately 7:00 PM";
	}
	if(ticks > 14000 && ticks <= 15000)
	{
		return "is approximately 8:00 PM";
	}
	if(ticks > 15000 && ticks <= 16000)
	{
		return "is approximately 9:00 PM";
	}
	if(ticks > 16000 && ticks <= 17000)
	{
		return "is approximately 10:00 PM";
	}
	if(ticks > 17000 && ticks <= 18000)
	{
		return "is approximately 11:00 PM";
	}
	if(ticks > 18000 && ticks <= 19000)
	{
		return "is approximately 12:00 AM";
	}
	if(ticks > 19000 && ticks <= 20000)
	{
		return "is approximately 1:00 AM";
	}
	if(ticks > 20000 && ticks <= 21000)
	{
		return "is approximately 2:00 AM";
	}
	if(ticks > 21000 && ticks <= 22000)
	{
		return "is approximately 3:00 AM";
	}
	if(ticks > 22000 && ticks <= 23000)
	{
		return "is approximately 4:00 AM";
	}
	if(ticks > 23000)
	{
		return "is approximately 5:00 AM";
	}
}
}

 

 

And

http://www.minecraftforge.net/forum/index.php/topic,23417.0.html

Hi

 

You might find this useful for getting the player on the server side

http://greyminecraftcoder.blogspot.com.au/2013/10/server-side-class-linkage-map.html

 

Using EntityPlayer player = Minecraft.getMinecraft().thePlayer on the server side will either fail outright or lead to intermittent bugs/crashes if the server thread accesses a client object at the same time as the client thread.

 

-TGG