Java TCP server

TcpServer.java

import java.net.*;
import java.io.*;

public class TcpServer {

    public static void main(String[] args) {
        final int port = args.length >= 1 ? Integer.parseInt(args[0]) : 9000;

        try (ServerSocket serverSocket = new ServerSocket(port)) {
            System.out.println("Server is listening on port " + port);

            while (true) {
                Socket socket = serverSocket.accept();
                System.out.println("New client connected");

                InputStream input = socket.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(input));

                OutputStream output = socket.getOutputStream();
                PrintWriter writer = new PrintWriter(output, true);

                String text = "";
                int readSize = 1024;
                char[] buffer = new char[readSize];

                do {
                    int readCharsSize = reader.read(buffer, 0, readSize);
                    if (readCharsSize > 0) {
                        System.out.println("Number of chars read: " + readCharsSize);
                    }
                } while (!text.equals("bye"));
                socket.close();
            }

        } catch (IOException ex) {
            System.out.println("Server exception: " + ex.getMessage());
            ex.printStackTrace();
        }
    }
}