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org.znerd.math
Class BasicDigitSet

java.lang.Object
  |
  +--java.lang.Number
        |
        +--org.znerd.math.RealNumber
              |
              +--org.znerd.math.RationalNumber
                    |
                    +--org.znerd.math.DigitSet
                          |
                          +--org.znerd.math.BasicDigitSet
public final class BasicDigitSet
extends DigitSet

Basic implementation of a DigitSet.

Version:
$Revision: 1.9 $ $Date: 2002/06/24 21:43:38 $
Author:
Ernst de Haan (znerd@FreeBSD.org)
See Also:
Serialized Form

Fields inherited from class org.znerd.math.RealNumber
MAXIMUM_RADIX
 
Constructor Summary
protected BasicDigitSet(boolean positive, int radix, int[] digits, int exponent)
          Creates a new BasicDigitSet instance.
 
Method Summary
 int[] getDigits()
          Returns a new array containing all the digits.
 int getExponent()
          Returns the exponent.
 int getPrecision()
          Returns the precision, the total number of digits.
 int getRadix()
          Returns the radix or base.
 DigitSet toPrecisionImpl(int precision)
          Returns a digit set with the specified precision, actual implementation.
 
Methods inherited from class org.znerd.math.DigitSet
toPrecision
 
Methods inherited from class org.znerd.math.RationalNumber
add, add, compareTo, compareToImpl, compareToImpl, compareToImpl2, divide, divide, doubleValue, getDenominator, getNumerator, invert, multiply, multiply, negate, pow, pow, subtract, subtract, toBigDecimal, toBigDecimal, trunc
 
Methods inherited from class org.znerd.math.RealNumber
abs, byteValue, compareTo, compareTo, equals, fitsByte, fitsDouble, fitsFloat, fitsInt, fitsLong, fitsShort, floatValue, getSign, intValue, longValue, shortValue, toBigInteger, toString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

BasicDigitSet

protected BasicDigitSet(boolean positive,
                        int radix,
                        int[] digits,
                        int exponent)
                 throws IllegalArgumentException
Creates a new BasicDigitSet instance.
Parameters:
positive - indication if the number is positive or not.
radix - the radix for the number, always >= 2 and <= RealNumber.MAXIMUM_RADIX.
digits - the digits, not null.
exponent - the exponent for the number.
Throws:
IllegalArgumentException - if radix < 2 || radix > RealNumber.MAXIMUM_RADIX || digits == null || digits[i] < 0 || || digits[i] >= radix, where 0 <= i < digits.length.
Method Detail

getRadix

public int getRadix()
Description copied from class: DigitSet
Returns the radix or base. The radix is for example 10 for a decimal number and 16 for a hexadecimal number. A binary number has the smallest radix, 2.
Overrides:
getRadix in class DigitSet
Tags copied from class: DigitSet
Returns:
the radix, always > 1.

getExponent

public int getExponent()
Description copied from class: DigitSet
Returns the exponent.
Overrides:
getExponent in class DigitSet
Tags copied from class: DigitSet
Returns:
the exponent.

getDigits

public int[] getDigits()
Description copied from class: DigitSet
Returns a new array containing all the digits. Every digit in the returned array is an int value between 0 and the radix (i.e. 0 <= n < radix, where n is the digit).
Overrides:
getDigits in class DigitSet
Tags copied from class: DigitSet
Returns:
a new array containing all the digits, not null

getPrecision

public int getPrecision()
Description copied from class: DigitSet
Returns the precision, the total number of digits.
Overrides:
getPrecision in class DigitSet
Tags copied from class: DigitSet
Returns:
the precision, always >= 0.

toPrecisionImpl

public DigitSet toPrecisionImpl(int precision)
Description copied from class: DigitSet
Returns a digit set with the specified precision, actual implementation. This method is called from DigitSet.toPrecision(int).
Overrides:
toPrecisionImpl in class DigitSet
Tags copied from class: DigitSet
Parameters:
precision - the precision, guaranteed to be >= 1.
Returns:
a DigitSet that is equal to this number, truncated to the specified precision.
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