public String readWPHexString(int numOfBytes) throws IOException {
        StringBuilder b = new StringBuilder();
        for (int i = 0; i < numOfBytes; i++) {
            b.append(readWPHex());
        }
        return b.toString();
    }
Reads a series of bytes of the specified length, converting
each byte to its hexadecimal representation.
converting each characters to .

@param numOfBytes how many byte to read
@return an hexadecimal string
@throws IOException if not enough bytes remain
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/wordperfect/WPInputStream.java