Ny lösning på Server

public class ServerStart1 {

    public static void main(String[] args) {

        Server server = new Server("ExternalRegister.csv", 61616);
        server.serverHandler();

    }
}

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public class ServerStart2 {

    public static void main(String[] args) {

        Server server2 = new Server("ExternalRegister2.csv", 61614);
        server2.serverHandler();
    }
}

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public class Server {

    private String fileName;
    private int serverPort;


    public Server(String fileName, int serverPort) {
        this.fileName = fileName;
        this.serverPort = serverPort;
    }

    public String loadContacts() {
        String externalContacts = "";
        Scanner scanner = null;

        try {
            scanner = new Scanner(new File(fileName));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        while (scanner.hasNext()) {
            externalContacts += scanner.nextLine().replace(',', ' ') + "\n";
        }
        scanner.close();
        return externalContacts;
    }

    public void serverHandler() {
        try {
            ServerSocket serverSocket = new ServerSocket(serverPort);
            while (true) {
                Socket clientSocket = serverSocket.accept();
                new Thread(
                        new Runnable() {

                            public void run() {
                                try {
                                    InputStream inputStream = clientSocket.getInputStream();
                                    InputStreamReader inputStreamReader = new InputStreamReader(inputStream);

                                    OutputStream outputStream = clientSocket.getOutputStream();
                                    PrintWriter writer = new PrintWriter(outputStream);
                                    BufferedReader reader = new BufferedReader(inputStreamReader);

                                    for (String line = reader.readLine(); line != null; line = reader.readLine()) {
                                        if (line.equals("getall")) {
                                            writer.println(loadContacts());
                                            System.out.println("Contacts sent to Address Book.");
                                        }
                                        if (line.equals("exit")) {
                                            break;
                                        }
                                        writer.flush();
                                    }
                                    reader.close();
                                    writer.close();
                                    clientSocket.close();
                                } catch (SocketException e) {
                                    System.out.println("Connection to Address Book lost.");
                                } catch (Exception e) {
                                    e.printStackTrace();
                                }
                            }
                        }
                ).start();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}