Java Generics and Collections, 2nd Edition

Java Generics and Collections (2nd edition, updated for Java 21) is a practical guide to mastering generics and the Java Collections Framework. It explains how to use and design generic APIs, clarifies tricky concepts like wildcards and subtyping, and shows how generics work with reflection. The book also covers all major collection types, their performance traits, and best practices for choosing and extending them. It includes guidance on stream processing, concurrency, and design patterns, making it a complete resource for writing safe, efficient, and modern Java code.