Conceptual Java Evolution: From 8 to 25
Part 6: Java 14 & 15: Records, Text Blocks, and Sealed Classes
Java 14 finalised switch expressions and previewed records and pattern matching for instanceof. Java 15 made text blocks production-ready, introduced sealed classes in preview, and delivered the long-awaited helpful NullPointerExceptions. Together they laid the groundwork for modern Java's data-oriented programming model.