Modern Java Programming: From Java 8 to Java 21

Java has evolved rapidly, making older coding patterns outdated and inefficient. Keeping up with modern features from Java 8 through Java 21 is essential for writing clean, performant, and maintainable software today. This text-based course guides you through the evolution of modern Java, starting with foundational concepts and moving step-by-step into powerful modern features. You will transition from writing verbose legacy code to leveraging functional programming, robust type systems, and high-performance concurrency. What you'll learn: - Understand the core transition from legacy Java to modern functional programming paradigms using lambdas and streams. - Apply modern language features like records, sealed classes, and text blocks to write cleaner, more readable code. - Master pattern matching features for switch expressions and record patterns to simplify complex conditional logic. - Explore modern concurrency models, including virtual threads, to build highly scalable applications. - Practice refactoring older Java codebases into modern, idiomatic Java 21 syntax. The course begins with essential Java concepts and functional programming foundations, then systematically walks through major feature releases up to Java 21, complete with written explanations, code examples, and self-paced exercises. This course is designed for beginners looking to learn modern Java from scratch, as well as developers familiar with older Java versions who want to update their skills. No advanced programming experience is required. Start reading today to write modern, efficient, and industry-ready Java code.