Bug in tutorial

[Boris Garbuzov]

Thanks to those who advised me a tutorial
http://metalab.unc.edu/xml/slides/sd2000west/xmlandjava/189.html.
Just the code lines
    BigInteger low  = BigInteger.ZERO;
    BigInteger high = BigInteger.ONE;
need to be changed into
    BigInteger low  = new BigInteger ("0");
    BigInteger high = new BigInteger ("1");