IOException

IOException

try {
        Socket socket = new Socket(Lector.IP_DISPLAY, Lector.PUERTO_DISPLAY);

        if (socket == null) {
            envio(cadena);
            return;
        }
        socket.setSoTimeout(2000);
        PrintStream out = new PrintStream(socket.getOutputStream());

        out.println(cadena);

        if (out != null) {
            out.close();
        }

        if (socket != null) {
            socket.close();
        }

        out = null;
        socket = null;

    } catch (ConnectException cx) {
        // Aquí tratas la excepción, por ejemplo volver a intentar conectar.
    } catch (IOException ex) {
        LOGGER.log(Level.SEVERE, null, ex);
    }