NumberValue (JSR 354 (Money and Currency API) 1.0.3 API)

java.lang.Object
- java.lang.Number
- - javax.money.NumberValue

All Implemented Interfaces:

Serializable, Comparable<NumberValue>
```
public abstract class NumberValue
extends Number
implements Comparable<NumberValue>
```
Instances of this class allow to externalize the numeric value of a MonetaryAmount. The classs extends Number for maximal compatibility with the JDK but also adds additional functionality to overcome some of the pitfalls of the JDK's Number class.
Implementation specification

Implementations of this interface must be
- Comparable, hereby comparing the numeric value.
- immutable
- serializable
- thread-safe
Author:

Anatole Tresch

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

NumberValue()

Constructors
Constructor	Description
`NumberValue()`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compareTo(NumberValue other)`
`abstract double`	`doubleValueExact()`	Access the numeric value as `double`.
`abstract long`	`getAmountFractionDenominator()`	This method allows to extract the denominator part of the current fraction, hereby given `w = longValue() n = getFractionNominator() d = getFractionDenominator()` the following must be always true: `!`
`abstract long`	`getAmountFractionNumerator()`	This method allows to extract the numerator part of the current fraction, hereby given `w = longValue() n = getFractionNominator() d = getFractionDenominator()` the following must be always true: `!`
`abstract Class<?>`	`getNumberType()`	Get the numeric implementation type, that is the base of this number.
`abstract int`	`getPrecision()`	Returns the precision of this `MonetaryAmount`.
`abstract int`	`getScale()`	Returns the scale of this `MonetaryAmount`.
`abstract int`	`intValueExact()`	Access the numeric value as `int`.
`abstract long`	`longValueExact()`	Access the numeric value as `long`.
`abstract <T extends Number> T`	`numberValue(Class<T> numberType)`	Access the numeric value as `Number`.
`abstract <T extends Number> T`	`numberValueExact(Class<T> numberType)`	Access the numeric value as `Number`.
`abstract NumberValue`	`round(MathContext mathContext)`	Access the current NumberValue rounded using the given `MathContext`.

Methods inherited from class java.lang.Number
byteValue, doubleValue, floatValue, intValue, longValue, shortValue

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NumberValue
```
public NumberValue()
```
- Method Detail
  - getNumberType
```
public abstract Class<?> getNumberType()
```
    Get the numeric implementation type, that is the base of this number.
    
    Returns:
    
    the numeric implementation type, not null.
  - getPrecision
```
public abstract int getPrecision()
```
    Returns the precision of this MonetaryAmount. (The precision is the number of digits in the unscaled value.)
    
    The precision of a zero value is 1.
    
    Returns:
    
    the precision of this MonetaryAmount.
  - getScale
```
public abstract int getScale()
```
    Returns the scale of this MonetaryAmount. If zero or positive, the scale is the number of digits to the right of the decimal point. If negative, the unscaled value of the number is multiplied by ten to the power of the negation of the scale. For example, a scale of -3 means the unscaled value is multiplied by 1000.
    
    Returns:
    
    the scale of this MonetaryAmount.
  - intValueExact
```
public abstract int intValueExact()
```
    Access the numeric value as int. Hereby no truncation will be performed to fit the value into the target data type.
    
    Returns:
    
    the (possibly) truncated value of the MonetaryAmount.
    
    Throws:
    
    ArithmeticException - If the value must be truncated to fit the target datatype.
  - longValueExact
```
public abstract long longValueExact()
```
    Access the numeric value as long. Hereby no truncation will be performed to fit the value into the target data type.
    
    Returns:
    
    the (possibly) truncated value of the MonetaryAmount.
    
    Throws:
    
    ArithmeticException - If the value must be truncated to fit the target datatype.
  - doubleValueExact
```
public abstract double doubleValueExact()
```
    Access the numeric value as double. Hereby no truncation will be performed to fit the value into the target data type.
    
    Returns:
    
    the (possibly) truncated value of the MonetaryAmount.
    
    Throws:
    
    ArithmeticException - If the value must be truncated to fit the target datatype.
  - numberValue
```
public abstract <T extends Number> T numberValue(Class<T> numberType)
```
    Access the numeric value as Number. Hereby truncation may be performed as needed to fit the value into the target data type.
    Parameters:
    numberType - The concrete number class to be returned. Basically the following Number types, must be supported if available on the corresponding runtime platform:
    
    java.lang.Long
    
    java.lang.Double
    
    java.lang.Number
    
    java.math.BigInteger, currently not available on all platforms.
    
    java.math.BigDecimal, currently not available on all platforms.
    Returns:
    
    the (possibly) truncated value of the MonetaryAmount.
  - round
```
public abstract NumberValue round(MathContext mathContext)
```
    Access the current NumberValue rounded using the given MathContext.
    
    Parameters:
    
    mathContext - the MathContext to be applied.
    
    Returns:
    
    the new NumberValue, never null.
    
    See Also:
    
    BigDecimal.round(java.math.MathContext)
  - numberValueExact
```
public abstract <T extends Number> T numberValueExact(Class<T> numberType)
```
    Access the numeric value as Number. Hereby no truncation will be performed to fit the value into the target data type.
    Parameters:
    numberType - The concrete number class to be returned. Basically the following Number types, must be supported if available on the corresponding runtime platform:
    
    java.lang.Long
    
    java.lang.Double
    
    java.lang.Number
    
    java.math.BigInteger, currently not available on all platforms.
    
    java.math.BigDecimal, currently not available on all platforms.
    Returns:
    
    the (possibly) truncated value of the MonetaryAmount.
    
    Throws:
    
    ArithmeticException - If the value must be truncated to fit the target datatype.
  - getAmountFractionNumerator
```
public abstract long getAmountFractionNumerator()
```
    This method allows to extract the numerator part of the current fraction, hereby given w = longValue() n = getFractionNominator() d = getFractionDenominator() the following must be always true: !(w<0 && n>0) and !(w>0 && n<0) and d>0 and |n| < d // || = absolute value.
    
    Returns:
    
    the amount's fraction numerator..
  - getAmountFractionDenominator
```
public abstract long getAmountFractionDenominator()
```
    This method allows to extract the denominator part of the current fraction, hereby given w = longValue() n = getFractionNominator() d = getFractionDenominator() the following must be always true: !(w<0 && n>0) and !(w>0 && n<0) and d>0 and |n| < d // || = absolute value.
    
    Returns:
    
    the amount's fraction denominator.
  - compareTo
```
public int compareTo(NumberValue other)
```
    Specified by:
    
    compareTo in interface Comparable<NumberValue>

Class NumberValue

Implementation specification

Constructor Summary

Method Summary

Methods inherited from class java.lang.Number

Methods inherited from class java.lang.Object

Constructor Detail

NumberValue

Method Detail

getNumberType

getPrecision

getScale

intValueExact

longValueExact

doubleValueExact

numberValue

round

numberValueExact

getAmountFractionNumerator

getAmountFractionDenominator

compareTo