ExamplePacketListener.java

package com.comphenix.example;

import java.util.logging.Logger;

import org.bukkit.plugin.Plugin;

import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.ConnectionSide;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.events.PacketEvent;
import com.comphenix.protocol.reflect.FieldAccessException;

public class ExamplePacketListener {

    private Plugin plugin;
    private Logger logger;

    public ExamplePacketListener(Plugin plugin) {
        this.plugin = plugin;
        this.logger = plugin.getLogger();
    }

    public void register() {
        ProtocolLibrary.getProtocolManager().addPacketListener(
            new PacketAdapter(plugin, ConnectionSide.SERVER_SIDE, 201) {
                @Override
                public void onPacketSending(PacketEvent event) {
                    // Item packets
                    logger.info("packet sending");
                    if (event.getPacketID() == 201) {
                        logger.info("packet ID 201");
                        try {
                            PacketContainer packet = event.getPacket();
                            String pName = (String) packet.getModifier().read(0);
                            logger.info("name: "+pName);
                            //StructureModifier<Byte> message = packet.getSpecificModifier(Byte.class);
                        } catch (FieldAccessException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
          });
    }

    public void unregister() {
        ProtocolLibrary.getProtocolManager().removePacketListeners(plugin);
    }
}