Professional Java: Advanced Techniques

The book "Professional Java: Advanced Techniques" is a practical guide for developers who already write confidently in Java and want to move to the next level: from Junior/Middle to Senior specialist. The author, Alexey Sokolov, a senior developer with 10 years of experience, has gathered in one book the most in-demand and complex topics that are rarely found in introductory textbooks.

What is this book about?

• Multithreading and Asynchrony: deep dive into java.util.concurrent, ForkJoinPool, CompletableFuture, lock management, race condition and deadlock issues, as well as modern approaches with Project Loom (virtual threads).
• Internal JVM Structure: how garbage collectors work (G1, ZGC, Shenandoah), memory tuning, profiling and application tuning, working with ByteBuddy and bytecode instrumentation.
• Architecture and Patterns: not just GoF, but modern patterns for microservices, reactive systems (including Project Reactor and RxJava), as well as SOLID principles in real projects.
• Performance Optimization: benchmarking with JMH, CPU and memory profiling, working with caches, algorithmic complexity, and writing high-load code.
• Testing and Code Quality: unit tests with Mockito and PowerMock, integration testing with Testcontainers, property-based testing, as well as code review and static analysis.
• Modern Tools: working with Gradle and Maven at an advanced level, setting up CI/CD, containerizing Java applications (Docker, Jib), migrating to Java 17/21.

Who is this book for?

• Java developers with 2+ years of experience who want to systematize their knowledge.
• Team leads and architects looking for references for complex architectural decisions.
• Anyone preparing for a Senior Java Developer interview.

What will you learn after reading?

• How to write thread-safe code without pain and bugs.
• How to tune the JVM for maximum performance of your application.
• How to properly design microservices in Java and avoid common mistakes.
• How to perform profiling and find bottlenecks in code.
• How to organize testing so that it brings benefit, not pain.

The book contains many code examples, practical tasks, and real-world cases from the industry. All examples are tested on Java 17 and 21, but the approaches are also applicable to older versions.

"Professional Java: Advanced Techniques" is not just a reference book, but a desktop companion for those who want to write high-quality, fast, and maintainable Java code.