Most of the tutorials  are realy about how to use various parts of the
API, although the Java 3D stuff does talk about large  parts of engine
design.

However if you look though some tutorials on Servlets (Tomcat) it does
have some examples of how to do server side programming  for web
applications.

Making games  is such a huge broad subject you would be amazed. Unless
you are talking about a realy simplistic game  you are talking about 4
different programming fields (GUI/ClientSide, ServerSide, Middleware,
DataBase), if it is a networked game you can add networking fields as well.

So if you want to become a leet game developer I would recommend
learning everything you can about programming.

> And what tools  i need to start  with and what's size  they have?

To start programming games? I would recommend going though the
tutorials. After you have mastered every tutorial, go get some books
which have a titles along the lines of "Design Patterns in Java" and
have a read.

> NOTE: Almost forgot, i mean also an online  multi-player and a large area  for
them.
> Well, first things  first, right?
> ~The Mysterious~

Are you talking about something like a Massivly Multiplayer game?