Java: Tips and Best Practices — Professional Recipes

The book "Java: Tips and Best Practices" is not another syntax tutorial, but a collection of proven solutions and professional techniques that will help you write clean, performant, and reliable Java code. The author has compiled over 100 practical tips based on years of experience developing enterprise applications.

What is this book about?

The publication covers key aspects of professional Java development:

• Code Style and Structure — how to write readable classes, choose proper variable names, and avoid antipatterns.
• Working with Collections and Streams — effective use of Stream API, Optional, and choosing correctly between ArrayList and LinkedList.
• Multithreading and Concurrency — tips for working with threads, pools, CompletableFuture, and avoiding deadlocks.
• Profiling and Optimization — how to find bottlenecks using JProfiler, VisualVM, and configure GC.
• Testing and Debugging — best practices for JUnit, Mockito, integration tests, and logging.
• Refactoring — step-by-step recipes for turning "spaghetti code" into a maintainable architecture.

Who is this book for?

• Junior developers who want to quickly advance to the Middle level and avoid common mistakes.
• Middle developers seeking to deepen their knowledge in optimization and design.
• Tech leads and architects looking for ready-made patterns for code reviews and mentoring.
• Anyone who writes Java and wants to improve the quality of their code.

What will you learn?

• How to properly handle exceptions without losing stack traces.
• Why StringBuilder is often faster than concatenation, and when it is not.
• Secrets of configuring G1GC and ZGC for low latency.
• How to write safe multithreaded code without locks.
• 10 antipatterns in Java that you should avoid.
• Techniques for working with records, sealed classes, and pattern matching.

The book is written in a lively style, with each tip accompanied by code, explanations, and "before/after" examples. You will be able to immediately apply the knowledge gained in real projects. "Java: Tips and Best Practices" will become your go-to book for daily work — from writing the first line of code to deploying to production.