Spring Full-Stack Practical Cases

May 22, 2026 · Fundamentals

Upgrade from Java 8: 8 Powerful Features in Java 21 You Should Know

The article examines why many projects still cling to Java 8 and demonstrates eight transformative Java 21 features—including records, sealed classes, pattern‑matching for instanceof, switch expressions, text blocks, virtual threads, structured concurrency, and enhanced APIs—showing code examples and the benefits they bring to performance, readability, and maintainability.