JDK-21

JDK 21 is the official Java Development Kit for the Java 21 Long-Term Support (LTS) release, designed for application developers. It includes all the tools needed to compile, debug, and run Java applications, such as the javac compiler and the Java Virtual Machine. This version is critically important as it finalizes several major features from Project Loom, most notably Virtual Threads, which fundamentally simplifies the development of high-throughput concurrent applications. It also introduces other key features like Sequenced Collections, Scoped Values, and enhanced Pattern Matching.