TCP + UDP Java Echo Server.

Main.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Main {
	public static void main(String[] args) {
		// TCP
		new Thread(new Runnable() {
			@Override
			public void run() {
				ExecutorService executor = null;
				try (ServerSocket server = new ServerSocket(1234)) {
					executor = Executors.newFixedThreadPool(5);
					System.out.println("Listening on TCP port 1234, Say hi!");
					while (true) {
						final Socket socket = server.accept();
						executor.execute(new Runnable() {
							@Override
							public void run() {
								String inputLine = "";
								System.err.println(
										socket.toString() + " ~> connected");
								try (PrintWriter out = new PrintWriter(
										socket.getOutputStream(), true);
										BufferedReader in = new BufferedReader(
												new InputStreamReader(socket
														.getInputStream()))) {
									while (!inputLine.equals("!quit")
											&& (inputLine = in
													.readLine()) != null) {
										System.out.println(socket.toString()
												+ ": " + inputLine);
										// Echo server...
										out.println(inputLine);
									}
								} catch (IOException ioe) {
									ioe.printStackTrace();
								} finally {
									try {
										System.err.println(socket.toString()
												+ " ~> closing");
										socket.close();
									} catch (IOException ioe) {
										ioe.printStackTrace();
									}
								}
							}
						});
					}
				} catch (IOException ioe) {
					System.err.println("Cannot open the port on TCP");
					ioe.printStackTrace();
				} finally {
					System.out.println("Closing TCP server");
					if (executor != null) {
						executor.shutdown();
					}
				}
			}
		}).start();

		// UDP
		new Thread(new Runnable() {
			@Override
			public void run() {
				try (DatagramSocket socket = new DatagramSocket(1234)) {
					byte[] buf = new byte[socket.getReceiveBufferSize()];
					DatagramPacket packet = new DatagramPacket(buf, buf.length);

					System.out.println("Listening on UDP port 1234, Say hi!");
					while (true) {
						socket.receive(packet);
						System.out.println(packet.getSocketAddress().toString()
								+ ": " + new String(buf, "UTF-8"));
						// Echo server
						socket.send(packet);
					}
				} catch (IOException ioe) {
					System.err.println("Cannot open the port on UDP");
					ioe.printStackTrace();
				} finally {
					System.out.println("Closing UDP server");
				}
			}
		}).start();
	}
}

Can u share client socket or full project please?
my email is: erikrozay@gmail.com

Can u share client socket or full project please?
my email is: bkarapelit48@gmail.com