Полезное чтение - разминка для ума

Introduction
Like any human language, Java provides a way to express
concepts. If successful, this medium of expression will be
significantly easier and more flexible than the alternatives
as problems grow larger and more complex.
You can’t look at Java as just a collection of features—some of the features
make no sense in isolation. You can use the sum of the parts only if you
are thinking about design, not simply coding. And to understand Java in
this way, you must understand the problems with it and with
programming in general. This book discusses programming problems,
why they are problems, and the approach Java has taken to solve them.
Thus, the set of features I explain in each chapter are based on the way I
see a particular type of problem being solved with the language. In this
way I hope to move you, a little at a time, to the point where the Java
mindset becomes your native tongue.
Throughout, I’ll be taking the attitude that you want to build a model in
your head that allows you to develop a deep understanding of the
language; if you encounter a puzzle you’ll be able to feed it to your model
and deduce the answer.