I'm trying to test out the sendMessage function with an item that sends a message through chat when you right-click with it. However, for some reason, it's having a bit of an issue: it's sending the message twice. I have no idea why it's happening, but it is. I've got a video of that happening here, and I'll include the code for the item under a spoiler. Anyone have an idea what's happening?

Spoiler

package space.bbkr.aura.item;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.text.TextComponentTranslation;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.util.EnumActionResult;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraft.item.Item;
import space.bbkr.aura.Aura;

public class ItemNote extends ItemBase {


    protected String name;

    public ItemNote(String name) {
        super(name);
        setMaxStackSize(1);
        setCreativeTab(Aura.creativeTab);
    }


    public EnumActionResult onItemUse(EntityPlayer p, World w, BlockPos pos, EnumHand h, EnumFacing f, float x, float y, float z) {
        p.sendMessage(new TextComponentTranslation("aura.note.start"));
        return EnumActionResult.SUCCESS;
    }


}

ItemBase, the class ItemNote extends, is:

package space.bbkr.aura.item;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.Item;
import space.bbkr.aura.Aura;

public class ItemBase extends Item {

    protected String name;

    public ItemBase(String name) {
        this.name = name;
        setUnlocalizedName(name);
        setRegistryName(name);
    }

    public void registerItemModel() {
        Aura.proxy.registerItemRenderer(this, 0, name);
    }

    @Override
    public ItemBase setCreativeTab(CreativeTabs tab) {
        super.setCreativeTab(tab);
        return this;
    }
}

 

 

Keep in mind that the onItemUse() method will be called twice: once on the server, and once on the client. That's why you're getting two outputs, since both calls are sending a message.

 

You can check which side is calling the method from the World#isRemote member. In your case, the world is a parameter called w, so you can check w.isRemote to see the side. If isRemote is false, it's the server, if it's true, it's the client.

 

For instance, if your code only does things on the server, you can simply bypass it on the client by putting this snippet at the top of your method body:

 

if (w.isRemote) {
	return EnumActionResult.PASS;
}

 

Edited September 1, 20178 yr by IceMetalPunk

Ah, much better. Thank you!