public short readInt16(int readingLength) throws IOException {
        byte[] uint16Bytes = this.getBytes(readingLength, 2);
        return LittleEndianBitConverter.toInt16(uint16Bytes, 0);
    }
Read specified bit length content as an UInt16 type and increase the bit offset with the specified length.

@param readingLength Specify the reading bit length.
@return Return the UInt16 value.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/onenote/fsshttpb/util/BitReader.java