Hello everyone. I started learning java and soon started working in forge. I have 1 question. How can I send a message to a player when he loggins on the world? In 1.6, I think this worked: NetworkRegistry.instance().registerConnectionHandler(new ConnectionHandler()); (and that i could create the class ConnectionHandler and everything is easy), but now I get an error when I write this part. Any help, please?

you need to create and register an event handler for your mod and then you can use the following in said event handler.

@SubscribeEvent
public void loginEvent(EntityJoinWorldEvent event){
if (event.entity instanceof EntityPlayer && event.world.isRemote)
	((EntityPlayer)event.entity).addChatComponentMessage(new ChatComponentText("Welcome to the world!!!!"));
}

if you dont know how to setup an event handler i can give you instructions.

I would really appreciate if you could give me the instructions

If you want a global message then I think this will work:

 

FMLClientHandler.instance().getClient().ingameGUI.getChatGUI().printChatMessage(new ChatComponentText("Welcom" + player));

 

But if you want it to just be sent to the specific person I am not sure sorry.