Server

package com.company;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Created by Ivan on 3/16/2016.
 */
public class CommunicationServer {
    private static int port = 20222;
    private static ServerSocket listenSock = null;
    private Socket sock = null;
    private static CommunicationServer instance = null;

    protected CommunicationServer() {
        System.out.println("Communication has started");
    }

    public static CommunicationServer getInstance() {
        if (instance == null) {
            instance = new CommunicationServer();
            try{
                listenSock = new ServerSocket(port);
            } catch (IOException ex){
                ex.printStackTrace();
            }
        }

        return instance;
    }

    public void StartCommunicationg(String message) {
        try {



            //while(true) {
            this.sock = listenSock.accept();

            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(sock.getOutputStream()));

            writer.write(message + "/n");
            writer.flush();
            writer.close();
            sock.close();
            //}
        } catch (IOException ex) {
            ex.printStackTrace();
        }


    }
}