The book of Herbert Shildt, one of the most famous authors of computer literature, is devoted to discussing complex programming issues. It discusses in detail parameterized functions and classes, as well as programming problems such as implementing sparse arrays, building programs for parsing mathematical expressions, algorithms for encrypting and compressing data, as well as the problems of developing your own programming languages ​ ​ and writing interpreters for them. Valuable practical tips on techniques and methods of work, as well as texts of ready-made working programs are provided.