private void close() {
            try {
                if (sOutput != null) sOutput.close();
            } catch (Exception e) {
            }
            try {
                if (sInput != null) sInput.close();
            } catch (Exception e) {
            }
            ;
            try {
                if (socket != null) socket.close();
            } catch (Exception e) {
            }

        }