Returns the integer which takes up the specified number
of bytes in this buffer.
@throws IOException if the result is not within the valid
range for integer, i.e. between int.min and
int.max.
@param len the number of bytes to use.
@return the integer.
Returns the integer which takes up the specified number of bytes in this buffer. @throws IOException if the result is not within the valid range for integer, i.e. between int.min and int.max. @param len the number of bytes to use. @return the integer.