For the first time, the reader can get acquainted with the full version of this classic work, which was previously published in Russian in an abbreviated form. The book, which went through more than one reprint in the original, is considered one of the best manuals for programmers for its deep and truly philosophical presentation of the intricacies of the Java language. To truly understand the Java language, you need to look at it not just as a set of commands and operators, but to understand its "philosophy", its approach to solving problems, in comparison with those of other programming languages. On these pages, the author talks about the main problems of writing code: what their nature is and what approach Java takes to resolve them. Therefore, the features of language discussed in each chapter are inextricably linked to how they are used to solve specific problems.