How do you use Selector with a simple code example?

In Java, a Selector is used to multiplex I/O operations, allowing a single thread to manage multiple channels (like sockets). This is particularly useful in network applications where you want to handle many connections efficiently.

Example of Using Selector


        import java.io.IOException;
        import java.net.InetSocketAddress;
        import java.nio.channels.Selector;
        import java.nio.channels.ServerSocketChannel;
        import java.nio.channels.SocketChannel;
        import java.nio.channels.SelectionKey;
        import java.nio.channels.SelectableChannel;
        import java.util.Iterator;

        public class SelectorExample {
            public static void main(String[] args) throws IOException {
                Selector selector = Selector.open();
                ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
                serverSocketChannel.bind(new InetSocketAddress(5000));
                serverSocketChannel.configureBlocking(false);
                serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT);

                while (true) {
                    selector.select();
                    Iterator keys = selector.selectedKeys().iterator();

                    while (keys.hasNext()) {
                        SelectionKey key = keys.next();
                        keys.remove();

                        if (key.isAcceptable()) {
                            SocketChannel clientChannel = serverSocketChannel.accept();
                            // Handle new client connection
                        }
                    }
                }
            }
        }

How do you use Selector with a simple code example?

Example of Using Selector

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How do you use Selector with a simple code example?

Example of Using Selector

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