I have a mod that makes a flying ring. I think it should be SMP compatible, but I get this error upon loading a forge server:

java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
        at in.joegold.flyingring.FlyingRingItem.<init>(FlyingRingItem.java:24)
        at in.joegold.flyingring.FlyingRing.<clinit>(FlyingRing.java:36)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:416)
        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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
        at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
        at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
        at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
        at com.google.common.eventbus.EventBus.post(EventBus.java:268)

 

Anyone have any suggestions? I'll post any code if requested, but here's a list of my classes:

 

Thanks,

jshreder

I have this line

private Minecraft mc = Minecraft.getMinecraft();

in my main class, because I use

mc.thePlayer.capabilities.isFlying == true

to check whether the player is flying, among other things. How would I change this?

I'm still having some trouble, would you mind being a bit more specific? I understand what you're saying, just not how to implement it, considering the ring that makes you fly affects only one player. Thanks.

No, the idea is that you can craft a ring that lets only you fly. It fully works in SSP, but it crashes, as I said, in SMP.

That's the problem. That is what I do, but I use the Minecraft class to get the player. How else would I do it?

 

Here is my code for the item class:

package in.joegold.flyingring;

import net.minecraft.client.Minecraft;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

public class FlyingRingItem extends Item {

    private Minecraft mc = Minecraft.getMinecraft();

    public FlyingRingItem(int id) {
        super(id);

        // Constructor Configuration
        setMaxStackSize(1);
        setCreativeTab(CreativeTabs.tabTools);
        setIconIndex(0);
        setItemName("flyingRingItem");
    }

    @Override
    public String getTextureFile() {
        return CommonProxy.ITEMS_PNG;
    }

    @Override
    public void onUpdate(ItemStack par1ItemStack, World par2World, Entity par3Entity, int par4, boolean par5) {
        super.onUpdate(par1ItemStack, par2World, par3Entity, par4, par5);

        if (mc.thePlayer.inventory.hasItem(24537)) {
            mc.thePlayer.capabilities.allowFlying = true;
        }

        if (mc.thePlayer.capabilities.isFlying == true) {
            this.setIconIndex(1);
        } else {
            this.setIconIndex(0);
        }
    }
}

to make isFlying true try this

@Override

    public void onUpdate(ItemStack par1ItemStack, World par2World, Entity par3Entity, int par4, boolean par5) {

        super.onUpdate(par1ItemStack, par2World, par3Entity, par4, par5);

      if(par3Entity instanceof EntityPlayer){

        EntityPlayer player = (EntityPlayer)par3Entity;

        if (player .inventory.hasItem(24537)) {

            player .capabilities.allowFlying = true;

        }

 

        if (player.capabilities.isFlying == true) {

            this.setIconIndex(1);

        }} else {

            this.setIconIndex(0);

        }

    }

 

 

Thank you so much! It seems to be working now . I'll pm you a link to the mod on mcforums when I have it up, if you wouldn't mind taking a look at it.

 

Thanks again,

jshreder