Server

package Server;

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

public class Server
{
    final int PORT = 3547;
    ServerSocket serverSocket;
    Socket socket;
    ArrayList<ComputerConnections> comCon = new ArrayList<ComputerConnections>();

    public static void main(String[] args) throws IOException
    {
        new Server().start();
    }

    public void start() throws IOException
    {
        serverSocket = new ServerSocket(PORT);

        while (true)
        {
            try {
                socket = serverSocket.accept();

                comCon.add(new ComputerConnections(socket));

                new Thread(new ServerHandler()).start();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

    private class ServerHandler implements Runnable
    {
        public void run()
        {
            String message = null;

            try {
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

                while ((message = bufferedReader.readLine()) != null)
                {
                    for (ComputerConnections ccc: comCon)
                    {
                        ccc.printWriter.println(message);
                        ccc.printWriter.flush();
                    }
                }
                bufferedReader.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

    private class ComputerConnections
    {
        Socket socket;
        PrintWriter printWriter;

        public ComputerConnections(Socket socket)
        {
            this.socket = socket;

            go();
        }

        public void go()
        {
            try {
                printWriter = new PrintWriter(socket.getOutputStream(), true);
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}