WetterstationServer/src/xyz/nextn/Server.java

package xyz.nextn;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    private ServerSocket serverSocket;

    public void start(int port){
        try {
            serverSocket = new ServerSocket(port);
        } catch (IOException e) {
            e.printStackTrace();
        }
        while (true) {
            try {
                new EchoClientHandler(serverSocket.accept()).start();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void stop() throws IOException {
        serverSocket.close();
    }

    private static class EchoClientHandler extends Thread {
        private Socket clientSocket;
        private PrintWriter out;
        private BufferedReader in;

        public EchoClientHandler(Socket socket) {
            this.clientSocket = socket;
        }

        public void run() {
            try {
                out = new PrintWriter(clientSocket.getOutputStream(), true);
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                in = new BufferedReader(
                        new InputStreamReader(clientSocket.getInputStream()));
            } catch (IOException e) {
                e.printStackTrace();
            }

            String inputLine = null;
            while (true) {
                try {
                    if (!((inputLine = in.readLine()) != null)) break;
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (".".equals(inputLine)) {
                    out.println("bye");
                    break;
                }
                out.println(inputLine);
            }

            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            out.close();
            try {
                clientSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}