Does NIO provide a non-blocking mechanism for data stream processing?

Yes, Java NIO (New I/O) provides a non-blocking mechanism for processing data streams. Unlike traditional blocking I/O, NIO allows working with channels and buffers so that the thread is not blocked while waiting for data. This is achieved through selectors, which enable a single thread to monitor multiple channels and react only when data is ready for reading or writing.

This approach is efficient for servers with a large number of connections, as it allows handling many clients without dedicating a separate thread for each connection.