Example: Packet handler as an outer class

MessagePacketHandler.java

package com.padwolf.minecraft.t1d.packets;

import com.padwolf.minecraft.t1d.refs.Functions;

import cpw.mods.fml.common.network.simpleimpl.IMessage;
import cpw.mods.fml.common.network.simpleimpl.IMessageHandler;
import cpw.mods.fml.common.network.simpleimpl.MessageContext;

public class MessagePacketHandler implements IMessageHandler<MessagePacket, IMessage> 
{
	public MessagePacketHandler() {}
	
	@Override
	public IMessage onMessage(MessagePacket message, MessageContext ctx) 
	{
		Functions.sendChatMessage(ctx.getServerHandler().playerEntity, String.format("Received %s from %s", message.data, ctx.getServerHandler().playerEntity.getDisplayName()));
        return null; // no response in this case
	}	
}