Top Description Fields Constructors Methods
org.bouncycastle.math.ec

pack-priv Class SimpleBigDecimal

extends Object
Class Inheritance
Imports
java.math.BigInteger
Class representing a simple version of a big decimal. A SimpleBigDecimal is basically a BigInteger with a few digits on the right of the decimal point. The number of (binary) digits on the right of the decimal point is called the scale of the SimpleBigDecimal. Unlike in BigDecimal, the scale is not adjusted automatically, but must be set manually. All SimpleBigDecimals taking part in the same arithmetic operation must have equal scale. The result of a multiplication of two SimpleBigDecimals returns a SimpleBigDecimal with double scale.

Field Summary

Modifier and TypeField and Description
private final BigInteger
bigInt

private final int
scale

private static final long
serialVersionUID

Constructor Summary

AccessConstructor and Description
public
SimpleBigDecimal(BigInteger
The bigInt value parameter.
bigInt, int
The scale of the constructed SimpleBigDecimal.
scale)

Constructor for SimpleBigDecimal.

Method Summary

Modifier and TypeMethod and Description
public SimpleBigDecimal
add(SimpleBigDecimal b)

public SimpleBigDecimal
add(BigInteger b)

public SimpleBigDecimal
adjustScale(int newScale)

private void
checkScale(SimpleBigDecimal b)

public int
compareTo(SimpleBigDecimal val)

public int
compareTo(BigInteger val)

public SimpleBigDecimal
divide(SimpleBigDecimal b)

public SimpleBigDecimal
divide(BigInteger b)

public boolean
equals(Object
the reference object with which to compare.
o)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.
public BigInteger
floor()

public static SimpleBigDecimal

Returns:

The such created SimpleBigDecimal.
getInstance(BigInteger
The value of the SimpleBigDecimal to be created.
value, int
The scale of the SimpleBigDecimal to be created.
scale)

Returns a SimpleBigDecimal representing the same numerical value as value.

public int
getScale()

public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for the object.
public int
intValue()

public long
longValue()

public SimpleBigDecimal
multiply(SimpleBigDecimal b)

public SimpleBigDecimal
multiply(BigInteger b)

public SimpleBigDecimal
negate()

public BigInteger
round()

public SimpleBigDecimal
shiftLeft(int n)

public SimpleBigDecimal
subtract(SimpleBigDecimal b)

public SimpleBigDecimal
subtract(BigInteger b)

public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of the object.
Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAllwaitwaitwait

Field Detail

bigIntback to summary
private final BigInteger bigInt
scaleback to summary
private final int scale
serialVersionUIDback to summary
private static final long serialVersionUID

Constructor Detail

SimpleBigDecimalback to summary
public SimpleBigDecimal(BigInteger bigInt, int scale)

Constructor for SimpleBigDecimal. The value of the constructed SimpleBigDecimal equals bigInt / 2scale.

Parameters
bigInt:BigInteger

The bigInt value parameter.

scale:int

The scale of the constructed SimpleBigDecimal.

Method Detail

addback to summary
public SimpleBigDecimal add(SimpleBigDecimal b)
addback to summary
public SimpleBigDecimal add(BigInteger b)
adjustScaleback to summary
public SimpleBigDecimal adjustScale(int newScale)
checkScaleback to summary
private void checkScale(SimpleBigDecimal b)
compareToback to summary
public int compareTo(SimpleBigDecimal val)
compareToback to summary
public int compareTo(BigInteger val)
divideback to summary
public SimpleBigDecimal divide(SimpleBigDecimal b)
divideback to summary
public SimpleBigDecimal divide(BigInteger b)
equalsback to summary
public boolean equals(Object o)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
o:Object

the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

floorback to summary
public BigInteger floor()
getInstanceback to summary
public static SimpleBigDecimal getInstance(BigInteger value, int scale)

Returns a SimpleBigDecimal representing the same numerical value as value.

Parameters
value:BigInteger

The value of the SimpleBigDecimal to be created.

scale:int

The scale of the SimpleBigDecimal to be created.

Returns:SimpleBigDecimal

The such created SimpleBigDecimal.

getScaleback to summary
public int getScale()
hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object.

intValueback to summary
public int intValue()
longValueback to summary
public long longValue()
multiplyback to summary
public SimpleBigDecimal multiply(SimpleBigDecimal b)
multiplyback to summary
public SimpleBigDecimal multiply(BigInteger b)
negateback to summary
public SimpleBigDecimal negate()
roundback to summary
public BigInteger round()
shiftLeftback to summary
public SimpleBigDecimal shiftLeft(int n)
subtractback to summary
public SimpleBigDecimal subtract(SimpleBigDecimal b)
subtractback to summary
public SimpleBigDecimal subtract(BigInteger b)
toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object.

Returns:String

a string representation of the object.