public native void setDTR(boolean value) throws IOException;

    @Override
    public native void setXONChar(char c) throws IOException;

    @Override
    public native void setXOFFChar(char c) throws IOException;

    @Override
    protected native int readSingle() throws IOException;

    /**
     * Read data from port
     *
     * @param b the data to be written
     * @param off the start offset in the data
     * @param len the number of bytes that are written
     * @exception IOException If an I/O error has occurred.
     */
    @Override
    protected native int readBytes(byte[] b, int off, int len) throws IOException;

    @Override
    protected native void writeSingle(int b) throws IOException;

    /**
     * Write data to port
     *
     * @param off the start offset in the data.
     * @param len the number of bytes to write.
     *
     */
     @Override
   protected native void writeBytes(byte[] b, int off, int len) throws IOException;

    @Override
    public native int getInBufferBytesCount() throws IOException;

    @Override
    public native int getOutBufferBytesCount() throws IOException;

    @Override
    protected native void setFlowControl(int mask) throws IOException;

    @Override
    protected native int getFlowControl0() throws IOException;

    @Override
    public native void setBreak(boolean value) throws IOException;

    @Override
    protected native void setBaudrate(int baudRate) throws IOException;

    @Override
    protected native void setDataBits(int value) throws IOException;

    @Override
    protected native void setStopBits(int value) throws IOException;

    @Override
    protected native void setParity(int parity) throws IOException;

    @Override
    protected native int getBaudrate0() throws IOException;

    @Override
    protected native int getDataBits0() throws IOException;

    @Override
    protected native int getStopBits0() throws IOException;

    @Override
    protected native int getParity0() throws IOException;

    @Override
    public native char getXONChar() throws IOException;

    @Override
    public native char getXOFFChar() throws IOException;

            case "Windows CE":
                throw new UnsupportedOperationException("Windows CE is currently not supported yet");
            case "OS/2":
                throw new UnsupportedOperationException("OS/2 is currently not supported yet");
            case "MPE/iX":
                throw new UnsupportedOperationException("MPE/iX is currently not supported yet");
            case "HP-UX":
                throw new UnsupportedOperationException("HP-UX is currently not supported yet");
            case "AIX":
                throw new UnsupportedOperationException("AIX is currently not supported yet");
            case "OS/390":
                throw new UnsupportedOperationException("OS/390 is currently not supported yet");
            case "FreeBSD":
                throw new UnsupportedOperationException("FreeBSD is currently not supported yet");
            case "Irix":
                throw new UnsupportedOperationException("Irix is currently not supported yet");
            case "Digital Unix":
                throw new UnsupportedOperationException("Digital Unix is currently not supported yet");
            case "NetWare 4.11":
                throw new UnsupportedOperationException("NetWare 4.11 is currently not supported yet");
            case "OSF1":
                throw new UnsupportedOperationException("OSF1 is currently not supported yet");
            case "OpenVMS":
                throw new UnsupportedOperationException("OpenVMS is currently not supported yet");
            default:
                throw new RuntimeException("Can't figure out OS: " + System.getProperty("os.name"));
        }

    }

    public native boolean isDTR();

    @Override
    public native boolean isIncommingRI();

    @Override
    public native void setRTS(boolean value) throws IOException;

    @Override
    public native void setDTR(boolean value) throws IOException;

    @Override
    public native void setXONChar(char c) throws IOException;

        public int read(byte b[], int off, int len) throws IOException {
            if (b == null) {
                throw new NullPointerException();
            } else if (off < 0 || len < 0 || len > b.length - off) {

                        }
                    });
        } catch (java.security.PrivilegedActionException e) {
            throw (IOException) e.getException();
        }
        return result;
    }

    @Override
    public OutputStream getOutputStream() throws IOException {