Tinker Programmer

Jul 15, 2026 · Fundamentals

Java Syntax Revolution (Part 2): No More POJOs—Records, Sealed Classes, Text Blocks

From Java 9 to 17 the language adds text blocks, switch expressions, helpful NullPointerExceptions, records and sealed classes, each illustrated with real‑world code, pitfalls and best‑practice tips that dramatically cut boilerplate, prevent bugs like missing breaks, and make data‑centric code far more concise.