Wall-E/src/DistributedSorter/SorterServer.java

package DistributedSorter;

import jdk.jshell.spi.ExecutionControl;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Arrays;

public class SorterServer implements Runnable {

    Socket client;
    public SorterServer(Socket client) {
        this.client = client;
    }

    public static void main(String[] args){
        final int port = 12345;
        try (ServerSocket socket = new ServerSocket(port)) {

            while (true){
                Socket client = socket.accept();
                Thread thread = new Thread(new SorterServer(client));
                thread.start();
            }
        }
        catch (Exception e) {
            System.err.println("Error: " + e.getMessage());
        }
    }

    public static void sendLine(Socket socket, String line) throws IOException {
        OutputStream out = socket.getOutputStream();
        PrintWriter writer = new PrintWriter(out);
        writer.println(line);
        writer.flush();
    }

    public static String receiveLine(Socket socket) throws IOException {
        InputStream in = socket.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        return reader.readLine();
    }


    private String sort(String line){
        char[] chars = line.toCharArray();
        Arrays.sort(chars);
        return new String(chars);
    }

    @Override
    public void run() {
        try{
        String line = receiveLine(client);
        String answer = sort(line);
        sendLine(client, answer);
        System.out.println(line + "-->"+ answer);
        } catch (IOException e) {
            System.err.println("Fehler");
        }
        finally{
            try{client.close();} catch(Exception e)
            {}
        }
    }
}