public static void socket_r (String action, String ip_addr, String to_write, int port)  throws IOException {

String s;

switch (action) {

            case "Create":      Socket socket = new Socket (ip_addr, port);
                                OutputStream out_from_socket = socket.getOutputStream();
                                PrintWriter writer_socket = new PrintWriter(out_from_socket, true);

                                InputStream input_socket = socket.getInputStream();
                                BufferedReader reader_socket = new BufferedReader(new InputStreamReader(input_socket));

                                break;

            case "Write":       writer_socket.println(to_write);
                                writer_socket.println();

                                break;

            case "Read":        while ((s = reader_socket.readLine()) != null) System.out.println(s);

                                break;

            case "Close":       writer_socket.println(to_write);
                                writer_socket.println();
                                writer_socket.close();
                                reader_socket.close();
                                break;
                }

}