What is Java 21?

Java 21 is the latest long-term support (LTS) release of the Java Standard Edition platform. It includes numerous new features and enhancements focused on improving developer productivity, performance, and maintainability. Key features often include virtual threads for high-throughput concurrent applications, pattern matching enhancements, and improved garbage collection. It's commonly used for developing enterprise applications, web services, and various other software solutions where stability and long-term support are critical.