public int compareTo (BigInteger val)

Compares this BigInteger with the specified BigInteger. This method is provided in preference to individual methods for each of the six boolean comparison operators ( <, ==, >, >=, !=, <=). The suggested idiom for performing these comparisons is: (x.compareTo(y) <op> 0), where <op> is one of the six comparison operators.

val    BigInteger to which this BigInteger is to be compared.

Returns:  -1, 0 or 1 as this BigInteger is numerically less than, equal to, or greater than val.