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UDP Echo Server With Channels

import java.net.DatagramSocket; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.nio.ByteBuffer; import java.nio.channels.DatagramChannel; public class MainClass {   public static void main(String[] args) throws Exception {     DatagramChannel channel = DatagramChannel.open();     DatagramSocket socket = channel.socket();     SocketAddress address = new InetSocketAddress(9999);     socket.bind(address);     ByteBuffer buffer = ByteBuffer.allocateDirect(65507);     while (true) {       SocketAddress client = channel.receive(buffer);       buffer.flip();       channel.send(buffer, client);       buffer.clear();     }   } }