java.math

Class SignedMutableBigInteger [ source ]

java.lang.Object

java.math.MutableBigInteger

java.math.SignedMutableBigInteger

 class SignedMutableBigInteger
extends MutableBigInteger

A class used to represent multiprecision integers that makes efficient use of allocated space by allowing a number to occupy only part of an array so that the arrays do not have to be reallocated as often. When performing an operation with many iterations the array used to hold a number is only increased when necessary and does not have to be the same size as the number it represents. A mutable number allows calculations to occur on the same number without having to create a new number for every step of the calculation as occurs with BigIntegers. Note that SignedMutableBigIntegers only support signed addition and subtraction. All other operations occur as with MutableBigIntegers.

Since:

1.3

See Also:

BigInteger

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	sign The sign of this MutableBigInteger.

Fields inherited from class java.math.MutableBigInteger

intLen, offset, ONE, value

Constructor Summary

Constructors

Constructor and Description
SignedMutableBigInteger() The default constructor.
SignedMutableBigInteger(int val) Construct a new MutableBigInteger with a magnitude specified by the int val.
SignedMutableBigInteger(MutableBigInteger val) Construct a new MutableBigInteger with a magnitude equal to the specified MutableBigInteger.

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	signedAdd(MutableBigInteger addend) Signed addition built upon unsigned add and subtract.
(package private) void	signedAdd(SignedMutableBigInteger addend) Signed addition built upon unsigned add and subtract.
(package private) void	signedSubtract(MutableBigInteger addend) Signed subtraction built upon unsigned add and subtract.
(package private) void	signedSubtract(SignedMutableBigInteger addend) Signed subtraction built upon unsigned add and subtract.
String	toString() Print out the first intLen ints of this MutableBigInteger's value array starting at offset.

Methods inherited from class java.math.MutableBigInteger

add, binaryGcd, clear, compare, compareHalf, copyValue, copyValue, divide, divide, divideOneWord, euclidModInverse, fixup, hybridGCD, inverseMod32, isEven, isNormal, isOdd, isOne, isZero, leftShift, modInverseBP2, modInverseMP2, mul, multiply, mutableModInverse, normalize, reset, rightShift, setInt, setValue, subtract, toBigDecimal, toBigInteger, toIntArray

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

sign

int sign

The sign of this MutableBigInteger.

Constructor Detail

SignedMutableBigInteger

SignedMutableBigInteger()

The default constructor. An empty MutableBigInteger is created with a one word capacity.

SignedMutableBigInteger

SignedMutableBigInteger(int val)

Construct a new MutableBigInteger with a magnitude specified by the int val.

SignedMutableBigInteger

SignedMutableBigInteger(MutableBigInteger val)

Construct a new MutableBigInteger with a magnitude equal to the specified MutableBigInteger.

Method Detail

signedAdd

void signedAdd(SignedMutableBigInteger addend)

Signed addition built upon unsigned add and subtract.

signedAdd

void signedAdd(MutableBigInteger addend)

Signed addition built upon unsigned add and subtract.

signedSubtract

void signedSubtract(SignedMutableBigInteger addend)

Signed subtraction built upon unsigned add and subtract.

signedSubtract

void signedSubtract(MutableBigInteger addend)

Signed subtraction built upon unsigned add and subtract.

toString

public String toString()

Print out the first intLen ints of this MutableBigInteger's value array starting at offset.

Overrides:

toString in class MutableBigInteger

Returns:

a string representation of the object.