Netty
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high-performance protocol servers and clients. It simplifies network programming such as TCP and UDP socket servers, providing a unified API for various transport types. It is widely used in Java for building scalable, high-concurrency network applications like web servers, proxies, and real-time communication systems.
Developers should learn Netty when building high-performance network applications that require low latency and high throughput, such as chat servers, game servers, or microservices communication layers. It is essential for Java developers working on distributed systems, IoT platforms, or any scenario where efficient handling of thousands of concurrent connections is critical, as it outperforms traditional blocking I/O approaches.