Development Assistance Importing problem SCREENSHOT

Ok so I am making a TABLIST plugin & at the very bottom I try to import ProtocolInjector but it says "ProtocolInjector cannot be resolved to a type"
I'm using Spigot-1.8.

PHP:

package plugin.tab.menu;

import net.minecraft.server.v1_8_R1.ChatSerializer;
import net.minecraft.server.v1_8_R1.IChatBaseComponent;
import net.minecraft.server.v1_8_R1.PlayerConnection;

import org.apache.logging.log4j.core.net.Protocol;
import org.bukkit.Bukkit;
import org.bukkit.craftbukkit.v1_8_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class TabMenu extends JavaPlugin implements Listener{
  
    public void onEnable(){
        Bukkit.getPluginManager().registerEvents(this, this);
    }

    @EventHandler
    public void onPlayerConnect(PlayerJoinEvent e){
        Player p = e.getPlayer();
      
        PlayerConnection connection = ((CraftPlayer) p).getHandle().playerConnection;
        IChatBaseComponent top = ChatSerializer.a("{'extra': [{text: 'Gaming', color: 'red', bold: 'true'}],'color': 'purple', 'bold': 'true', 'text': 'Eclipse'}");
        IChatBaseComponent bottom = ChatSerializer.a("{'extra': [{'color': 'orange', 'text': 'eclipse-mc-gaming.enjin.com', 'underlined': 'true'}], 'color': 'aqua', 'text': 'Sign up on the website - '}");
      
        connection.sendPacket(new ProtocolInjector.PacketTabHeader(top,bottom));
    }
}


That's the only problem then I export & it just gives errors & doesn't work.

 

Ok thank you kind of new to the website.

 

Which version of 1.8 are you using?

import net.minecraft.server.v1_8_R1.ChatSerializer <<<< if you're on 1.8.3 - this wont work.

It looks like this is the new function, but you'll have to look around a bit.
import net.minecraft.server.v1_8_R2.IChatBaseComponent;

 

Spigot 1.8.1
I did the Buildtools thing from Spigot mc and did 1.8

I'll add screenshot of the redline & what it says