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DecimalFormat Class Reference

Concrete class for formatting decimal numbers, allowing a variety of parameters, and localization to Western, Arabic, or Indic numbers. More...

#include <decimfmt.h>

Inheritance diagram for DecimalFormat:

NumberFormat Format

Public Types

enum  ERoundingMode {
  kRoundCeiling, kRoundFloor, kRoundDown, kRoundUp,
  kRoundHalfEven, kRoundHalfDown, kRoundHalfUp
}
enum  EPadPosition { kPadBeforePrefix, kPadAfterPrefix, kPadBeforeSuffix, kPadAfterSuffix }

Public Member Functions

 DecimalFormat (UErrorCode &status)
 Create a DecimalFormat using the default pattern and symbols for the default locale.
 DecimalFormat (const UnicodeString &pattern, UErrorCode &status)
 Create a DecimalFormat from the given pattern and the symbols for the default locale.
 DecimalFormat (const UnicodeString &pattern, DecimalFormatSymbols *symbolsToAdopt, UErrorCode &status)
 Create a DecimalFormat from the given pattern and symbols.
 DecimalFormat (const UnicodeString &pattern, DecimalFormatSymbols *symbolsToAdopt, UParseError &parseError, UErrorCode &status)
 Create a DecimalFormat from the given pattern and symbols.
 DecimalFormat (const UnicodeString &pattern, const DecimalFormatSymbols &symbols, UErrorCode &status)
 Create a DecimalFormat from the given pattern and symbols.
 DecimalFormat (const DecimalFormat &source)
 Copy constructor.
DecimalFormatoperator= (const DecimalFormat &rhs)
 Assignment operator.
virtual ~DecimalFormat ()
 Destructor.
virtual Formatclone (void) const
 Clone this Format object polymorphically.
virtual UBool operator== (const Format &other) const
 Return true if the given Format objects are semantically equal.
virtual UnicodeStringformat (double number, UnicodeString &toAppendTo, FieldPosition &pos) const
 Format a double or long number using base-10 representation.
virtual UnicodeStringformat (int32_t number, UnicodeString &toAppendTo, FieldPosition &pos) const
 Format a long number using base-10 representation.
virtual UnicodeStringformat (const Formattable &obj, UnicodeString &toAppendTo, FieldPosition &pos, UErrorCode &status) const
 Format a Formattable using base-10 representation.
UnicodeStringformat (const Formattable &obj, UnicodeString &result, UErrorCode &status) const
 Redeclared NumberFormat method.
UnicodeStringformat (double number, UnicodeString &output) const
 Redeclared NumberFormat method.
UnicodeStringformat (int32_t number, UnicodeString &output) const
 Redeclared NumberFormat method.
virtual void parse (const UnicodeString &text, Formattable &result, ParsePosition &parsePosition) const
 Parse the given string using this object's choices.
virtual void parse (const UnicodeString &text, Formattable &result, UErrorCode &error) const
 
virtual const DecimalFormatSymbolsgetDecimalFormatSymbols (void) const
 Returns the decimal format symbols, which is generally not changed by the programmer or user.
virtual void adoptDecimalFormatSymbols (DecimalFormatSymbols *symbolsToAdopt)
 Sets the decimal format symbols, which is generally not changed by the programmer or user.
virtual void setDecimalFormatSymbols (const DecimalFormatSymbols &symbols)
 Sets the decimal format symbols, which is generally not changed by the programmer or user.
UnicodeStringgetPositivePrefix (UnicodeString &result) const
 Get the positive prefix.
virtual void setPositivePrefix (const UnicodeString &newValue)
 Set the positive prefix.
UnicodeStringgetNegativePrefix (UnicodeString &result) const
 Get the negative prefix.
virtual void setNegativePrefix (const UnicodeString &newValue)
 Set the negative prefix.
UnicodeStringgetPositiveSuffix (UnicodeString &result) const
 Get the positive suffix.
virtual void setPositiveSuffix (const UnicodeString &newValue)
 Set the positive suffix.
UnicodeStringgetNegativeSuffix (UnicodeString &result) const
 Get the negative suffix.
virtual void setNegativeSuffix (const UnicodeString &newValue)
 Set the positive suffix.
int32_t getMultiplier (void) const
 Get the multiplier for use in percent, permill, etc.
virtual void setMultiplier (int32_t newValue)
 Set the multiplier for use in percent, permill, etc.
virtual double getRoundingIncrement (void)
 Get the rounding increment.
virtual void setRoundingIncrement (double newValue)
 Set the rounding increment.
virtual ERoundingMode getRoundingMode (void)
 Get the rounding mode.
virtual void setRoundingMode (ERoundingMode roundingMode)
 Set the rounding mode.
virtual int32_t getFormatWidth (void)
 Get the width to which the output of format() is padded.
virtual void setFormatWidth (int32_t width)
 Set the width to which the output of format() is padded.
UChar getPadCharacter (void)
 Get the first code unit of the string used to pad to the format width.
virtual UnicodeString getPadCharacterString ()
 Get the grapheme string (a character, possibly with modifier letters) used to pad to the format width.
void setPadCharacter (UChar padChar)
 Set a one-code unit string used to pad to the format width.
virtual void setPadCharacter (UnicodeString padChar)
 Set the grapheme string (a character, possibly with modifier letters) used to pad to the format width.
virtual EPadPosition getPadPosition (void)
 Get the position at which padding will take place.
virtual void setPadPosition (EPadPosition padPos)
 <font face="helvetica" color="red">NEW</font> Set the position at which padding will take place.
virtual UBool isScientificNotation (void)
 Return whether or not scientific notation is used.
virtual void setScientificNotation (UBool useScientific)
 Set whether or not scientific notation is used.
virtual int8_t getMinimumExponentDigits (void)
 Return the minimum exponent digits that will be shown.
virtual void setMinimumExponentDigits (int8_t minExpDig)
 Set the minimum exponent digits that will be shown.
virtual UBool isExponentSignAlwaysShown (void)
 Return whether the exponent sign is always shown.
virtual void setExponentSignAlwaysShown (UBool expSignAlways)
 Set whether the exponent sign is always shown.
int32_t getGroupingSize (void) const
 Return the grouping size.
virtual void setGroupingSize (int32_t newValue)
 Set the grouping size.
int32_t getSecondaryGroupingSize (void) const
 Return the secondary grouping size.
virtual void setSecondaryGroupingSize (int32_t newValue)
 Set the secondary grouping size.
UBool isDecimalSeparatorAlwaysShown (void) const
 Allows you to get the behavior of the decimal separator with integers.
virtual void setDecimalSeparatorAlwaysShown (UBool newValue)
 Allows you to set the behavior of the decimal separator with integers.
virtual UnicodeStringtoPattern (UnicodeString &result) const
 Synthesizes a pattern string that represents the current state of this Format object.
virtual UnicodeStringtoLocalizedPattern (UnicodeString &result) const
 Synthesizes a localized pattern string that represents the current state of this Format object.
virtual void applyPattern (const UnicodeString &pattern, UParseError &parseError, UErrorCode &status)
 Apply the given pattern to this Format object.
virtual void applyPattern (const UnicodeString &pattern, UErrorCode &status)
 Sets the pattern.
virtual void applyLocalizedPattern (const UnicodeString &pattern, UParseError &parseError, UErrorCode &status)
 Apply the given pattern to this Format object.
virtual void applyLocalizedPattern (const UnicodeString &pattern, UErrorCode &status)
virtual void setMaximumIntegerDigits (int32_t newValue)
 Sets the maximum number of digits allowed in the integer portion of a number.
virtual void setMinimumIntegerDigits (int32_t newValue)
 Sets the minimum number of digits allowed in the integer portion of a number.
virtual void setMaximumFractionDigits (int32_t newValue)
 Sets the maximum number of digits allowed in the fraction portion of a number.
virtual void setMinimumFractionDigits (int32_t newValue)
 Sets the minimum number of digits allowed in the fraction portion of a number.
virtual UClassID getDynamicClassID (void) const
 Returns a unique class ID POLYMORPHICALLY.

Static Public Member Functions

static UClassID getStaticClassID (void)
 Return the class ID for this class.

Static Public Attributes

static const char fgNumberPatterns []
 The resource tags we use to retrieve decimal format data from locale resource bundles.

Static Protected Attributes

static const int32_t kDoubleIntegerDigits
static const int32_t kDoubleFractionDigits

Detailed Description

Concrete class for formatting decimal numbers, allowing a variety of parameters, and localization to Western, Arabic, or Indic numbers.

Normally, you get the proper NumberFormat for a specific locale (including the default locale) using the NumberFormat factory methods, rather than constructing a DecimalNumberFormat directly.

Either the prefixes or the suffixes must be different for the parse to distinguish positive from negative. Parsing will be unreliable if the digits, thousands or decimal separators are the same, or if any of them occur in the prefixes or suffixes.

[Special cases:]

NaN is formatted as a single character, typically \uFFFD.

+/-Infinity is formatted as a single character, typically \u221E, plus the positive and negative pre/suffixes.

Note: this class is designed for common users; for very large or small numbers, use a format that can express exponential values.

[Example:]

 
     // normally we would have a GUI with a menu for this
     int32_t locCount;
     const Locale* locales = NumberFormat::getAvailableLocales(locCount);
     if (locCount > 12) locCount = 12;  //limit output
 
     double myNumber = -1234.56;
     UErrorCode success = U_ZERO_ERROR;
     NumberFormat* form; //= NumberFormat::createInstance(success);
 
     // just for fun, we print out a number with the locale number, currency
     // and percent format for each locale we can.
     UnicodeString countryName;
     UnicodeString displayName;
     UnicodeString str;
     UnicodeString pattern;
     Formattable fmtable;
     for (int32_t j = 0; j < 3; ++j) {
         cout << endl << "FORMAT " << j << endl;
         for (int32_t i = 0; i < locCount; ++i) {
             if (locales[i].getCountry(countryName).size() == 0) {
                 // skip language-only
                 continue;
             }
             switch (j) {
             default:
                 form = NumberFormat::createInstance(locales[i], success ); break;
             case 1:
                 form = NumberFormat::createCurrencyInstance(locales[i], success ); break;
             case 0:
                 form = NumberFormat::createPercentInstance(locales[i], success ); break;
             }
             if (form) {
                 str.remove();
                 pattern = ((DecimalFormat*)form)->toPattern(pattern);
                 cout << locales[i].getDisplayName(displayName) << ": " << pattern;
                 cout << "  ->  " << form->format(myNumber,str) << endl;
                 form->parse(form->format(myNumber,str), fmtable, success);
                 //cout << "   parsed: " << fmtable << endl;
                 delete form;  
             }
         }
     }
[The following shows the structure of the pattern.]
 
     pattern    := subpattern{;subpattern}
     subpattern := {prefix}integer{.fraction}{suffix}
     
     prefix     := '\\u0000'..'\\uFFFD' - specialCharacters
     suffix     := '\\u0000'..'\\uFFFD' - specialCharacters
     integer    := '#'* '0'* '0'
     fraction   := '0'* '#'*
   
  Notation:
     X*       0 or more instances of X
     (X | Y)  either X or Y.
     X..Y     any character from X up to Y, inclusive.
     S - T    characters in S, except those in T
 \code
 /pre>
 The first subpattern is for positive numbers. The second (optional)
 subpattern is used for negative numbers. (In both cases, ',' can
 occur inside the integer portion--it is just too messy to indicate
 in BNF.)  For the second subpattern, only the PREFIX and SUFFIX are
 noted; other attributes are taken only from the first subpattern.
 <P>
 Here are the special characters used in the parts of the
 subpattern, with notes on their usage.
 <pre>
 \code
     Symbol   Meaning
       0      a digit, showing up a zero if it is zero
       #      a digit, supressed if zero
       .      placeholder for decimal separator
       ,      placeholder for grouping separator.
       E      separates mantissa and exponent for exponential formats.
       ;      separates formats.
       -      default negative prefix.
       %      multiply by 100 and show as percentage
       \u2030 multiply by 1000 and show as per mille
       \u00A4 currency sign; replaced by currency symbol; if
              doubled, replaced by international currency symbol.
              If present in a pattern, the monetary decimal separator
              is used instead of the decimal separator.
       X      any other characters can be used in the prefix or suffix
       '      used to quote special characters in a prefix or suffix.
[Notes]

If there is no explicit negative subpattern, - is prefixed to the positive form. That is, "0.00" alone is equivalent to "0.00;-0.00".

Illegal formats, such as "#.#.#" in the same format, will cause a failing UErrorCode to be returned.

The grouping separator is commonly used for thousands, but in some countries for ten-thousands. The interval is a constant number of digits between the grouping characters, such as 100,000,000 or 1,0000,0000. If you supply a pattern with multiple grouping characters, the interval between the last one and the end of the integer determines the primary grouping size, and the interval between the last two determines the secondary grouping size (see below); all others are ignored. So "#,##,###,####" == "###,###,####" == "##,#,###,####".

Some locales have two different grouping intervals: One used for the least significant integer digits (the primary grouping size), and one used for all others (the secondary grouping size). For example, if the primary grouping interval is 3, and the secondary is 2, then this corresponds to the pattern "#,##,##0", and the number 123456789 is formatted as "12,34,56,789".

This class only handles localized digits where the 10 digits are contiguous in Unicode, from 0 to 9. Other digits sets (such as superscripts) would need a different subclass.


Constructor & Destructor Documentation

DecimalFormat::DecimalFormat UErrorCode status  ) 
 

Create a DecimalFormat using the default pattern and symbols for the default locale.

This is a convenient way to obtain a DecimalFormat when internationalization is not the main concern.

To obtain standard formats for a given locale, use the factory methods on NumberFormat such as getNumberInstance. These factories will return the most appropriate sub-class of NumberFormat for a given locale.

Parameters:
status Output param set to success/failure code. If the pattern is invalid this will be set to a failure code.

DecimalFormat::DecimalFormat const UnicodeString pattern,
UErrorCode status
 

Create a DecimalFormat from the given pattern and the symbols for the default locale.

This is a convenient way to obtain a DecimalFormat when internationalization is not the main concern.

To obtain standard formats for a given locale, use the factory methods on NumberFormat such as getNumberInstance. These factories will return the most appropriate sub-class of NumberFormat for a given locale.

Parameters:
pattern A non-localized pattern string.
status Output param set to success/failure code. If the pattern is invalid this will be set to a failure code.

DecimalFormat::DecimalFormat const UnicodeString pattern,
DecimalFormatSymbols symbolsToAdopt,
UErrorCode status
 

Create a DecimalFormat from the given pattern and symbols.

Use this constructor when you need to completely customize the behavior of the format.

To obtain standard formats for a given locale, use the factory methods on NumberFormat such as getInstance or getCurrencyInstance. If you need only minor adjustments to a standard format, you can modify the format returned by a NumberFormat factory method.

Parameters:
pattern a non-localized pattern string
symbolsToAdopt the set of symbols to be used. The caller should not delete this object after making this call.
status Output param set to success/failure code. If the pattern is invalid this will be set to a failure code.

DecimalFormat::DecimalFormat const UnicodeString pattern,
DecimalFormatSymbols symbolsToAdopt,
UParseError parseError,
UErrorCode status
 

Create a DecimalFormat from the given pattern and symbols.

Use this constructor when you need to completely customize the behavior of the format.

To obtain standard formats for a given locale, use the factory methods on NumberFormat such as getInstance or getCurrencyInstance. If you need only minor adjustments to a standard format, you can modify the format returned by a NumberFormat factory method.

Parameters:
pattern a non-localized pattern string
symbolsToAdopt the set of symbols to be used. The caller should not delete this object after making this call.
parseError Output param to receive errors occured during parsing
status Output param set to success/failure code. If the pattern is invalid this will be set to a failure code. ICU 2.0

DecimalFormat::DecimalFormat const UnicodeString pattern,
const DecimalFormatSymbols symbols,
UErrorCode status
 

Create a DecimalFormat from the given pattern and symbols.

Use this constructor when you need to completely customize the behavior of the format.

To obtain standard formats for a given locale, use the factory methods on NumberFormat such as getInstance or getCurrencyInstance. If you need only minor adjustments to a standard format, you can modify the format returned by a NumberFormat factory method.

Parameters:
pattern a non-localized pattern string
symbols the set of symbols to be used
status Output param set to success/failure code. If the pattern is invalid this will be set to a failure code.

DecimalFormat::DecimalFormat const DecimalFormat source  ) 
 

Copy constructor.

virtual DecimalFormat::~DecimalFormat  )  [virtual]
 

Destructor.


Member Function Documentation

virtual void DecimalFormat::adoptDecimalFormatSymbols DecimalFormatSymbols symbolsToAdopt  )  [virtual]
 

Sets the decimal format symbols, which is generally not changed by the programmer or user.

Parameters:
symbolsToAdopt DecimalFormatSymbols to be adopted.

virtual void DecimalFormat::applyLocalizedPattern const UnicodeString pattern,
UParseError parseError,
UErrorCode status
[virtual]
 

Apply the given pattern to this Format object.

The pattern is assumed to be in a localized notation. A pattern is a short-hand specification for the various formatting properties. These properties can also be changed individually through the various setter methods.

There is no limit to integer digits are set by this routine, since that is the typical end-user desire; use setMaximumInteger if you want to set a real value. For negative numbers, use a second pattern, separated by a semicolon

 .      Example "#,#00.0#" -> 1,234.56
 
This means a minimum of 2 integer digits, 1 fraction digit, and a maximum of 2 fraction digits.

Example: "#,#00.0#;(#,#00.0#)" for negatives in parantheses.

In negative patterns, the minimum and maximum counts are ignored; these are presumed to be set in the positive pattern.

Parameters:
pattern The localized pattern to be applied.
status Output param set to success/failure code on exit. If the pattern is invalid, this will be set to a failure result. ICU 2.0

virtual void DecimalFormat::applyPattern const UnicodeString pattern,
UErrorCode status
[virtual]
 

Sets the pattern.

Parameters:
pattern The pattern to be applied.
status Output param set to success/failure code on exit. If the pattern is invalid, this will be set to a failure result.

virtual void DecimalFormat::applyPattern const UnicodeString pattern,
UParseError parseError,
UErrorCode status
[virtual]
 

Apply the given pattern to this Format object.

A pattern is a short-hand specification for the various formatting properties. These properties can also be changed individually through the various setter methods.

There is no limit to integer digits are set by this routine, since that is the typical end-user desire; use setMaximumInteger if you want to set a real value. For negative numbers, use a second pattern, separated by a semicolon

 .      Example "#,#00.0#" -> 1,234.56
 
This means a minimum of 2 integer digits, 1 fraction digit, and a maximum of 2 fraction digits.
 .      Example: "#,#00.0#;(#,#00.0#)" for negatives in parantheses.
 
In negative patterns, the minimum and maximum counts are ignored; these are presumed to be set in the positive pattern.

Parameters:
pattern The pattern to be applied.
pattern The pattern to be applied.
parseError Struct to recieve information on position of error if an error is encountered
status Output param set to success/failure code on exit. If the pattern is invalid, this will be set to a failure result. ICU 2.0

virtual Format* DecimalFormat::clone void   )  const [virtual]
 

Clone this Format object polymorphically.

The caller owns the result and should delete it when done.

Implements Format.

UnicodeString & DecimalFormat::format int32_t  number,
UnicodeString output
const [inline]
 

Redeclared NumberFormat method.

Reimplemented from NumberFormat.

UnicodeString & DecimalFormat::format double  number,
UnicodeString output
const [inline]
 

Redeclared NumberFormat method.

Reimplemented from NumberFormat.

UnicodeString & DecimalFormat::format const Formattable obj,
UnicodeString result,
UErrorCode status
const [inline]
 

Redeclared NumberFormat method.

Reimplemented from NumberFormat.

virtual UnicodeString& DecimalFormat::format const Formattable obj,
UnicodeString toAppendTo,
FieldPosition pos,
UErrorCode status
const [virtual]
 

Format a Formattable using base-10 representation.

Parameters:
obj The value to be formatted.
toAppendTo The string to append the formatted string to. This is an output parameter.
pos On input: an alignment field, if desired. On output: the offsets of the alignment field.
status Error code indicating success or failure.
Returns:
A reference to 'toAppendTo'.

Reimplemented from NumberFormat.

virtual UnicodeString& DecimalFormat::format int32_t  number,
UnicodeString toAppendTo,
FieldPosition pos
const [virtual]
 

Format a long number using base-10 representation.

Parameters:
number The value to be formatted.
toAppendTo The string to append the formatted string to. This is an output parameter.
pos On input: an alignment field, if desired. On output: the offsets of the alignment field.
Returns:
A reference to 'toAppendTo'.

Implements NumberFormat.

virtual UnicodeString& DecimalFormat::format double  number,
UnicodeString toAppendTo,
FieldPosition pos
const [virtual]
 

Format a double or long number using base-10 representation.

Parameters:
number The value to be formatted.
toAppendTo The string to append the formatted string to. This is an output parameter.
pos On input: an alignment field, if desired. On output: the offsets of the alignment field.
Returns:
A reference to 'toAppendTo'.

Implements NumberFormat.

virtual const DecimalFormatSymbols* DecimalFormat::getDecimalFormatSymbols void   )  const [virtual]
 

Returns the decimal format symbols, which is generally not changed by the programmer or user.

Returns:
desired DecimalFormatSymbols
See also:
DecimalFormatSymbols

virtual UClassID DecimalFormat::getDynamicClassID void   )  const [inline, virtual]
 

Returns a unique class ID POLYMORPHICALLY.

Pure virtual override. This method is to implement a simple version of RTTI, since not all C++ compilers support genuine RTTI. Polymorphic operator==() and clone() methods call this method.

Returns:
The class ID for this object. All objects of a given class have the same class ID. Objects of other classes have different class IDs.

Reimplemented from NumberFormat.

virtual int32_t DecimalFormat::getFormatWidth void   )  [virtual]
 

Get the width to which the output of format() is padded.

Returns:
the format width, or zero if no padding is in effect
See also:
setFormatWidth

getPadCharacter

setPadCharacter

getPadPosition

setPadPosition

int32_t DecimalFormat::getGroupingSize void   )  const
 

Return the grouping size.

Grouping size is the number of digits between grouping separators in the integer portion of a number. For example, in the number "123,456.78", the grouping size is 3.

See also:
setGroupingSize

NumberFormat::isGroupingUsed

DecimalFormatSymbols::getGroupingSeparator

virtual int8_t DecimalFormat::getMinimumExponentDigits void   )  [virtual]
 

Return the minimum exponent digits that will be shown.

Returns:
the minimum exponent digits that will be shown
See also:
setScientificNotation

isScientificNotation

setMinimumExponentDigits

isExponentSignAlwaysShown

setExponentSignAlwaysShown

int32_t DecimalFormat::getMultiplier void   )  const
 

Get the multiplier for use in percent, permill, etc.

For a percentage, set the suffixes to have "%" and the multiplier to be 100. (For Arabic, use arabic percent symbol). For a permill, set the suffixes to have "\u2031" and the multiplier to be 1000.

Examples: with 100, 1.23 -> "123", and "123" -> 1.23

UnicodeString& DecimalFormat::getNegativePrefix UnicodeString result  )  const
 

Get the negative prefix.

Examples: -123, ($123) (with negative suffix), sFr-123

UnicodeString& DecimalFormat::getNegativeSuffix UnicodeString result  )  const
 

Get the negative suffix.

Examples: -123%, ($123) (with positive suffixes)

UChar DecimalFormat::getPadCharacter void   )  [inline]
 

Get the first code unit of the string used to pad to the format width.

The default is ' '.

Returns:
the first code unit of the pad string
See also:
setFormatWidth

getFormatWidth

setPadCharacter

getPadPosition

setPadPosition

Deprecated:
remove after 2000-dec-31.
See getPadCharacterString().

virtual UnicodeString DecimalFormat::getPadCharacterString  )  [virtual]
 

Get the grapheme string (a character, possibly with modifier letters) used to pad to the format width.

The default is " ". Note: The current implementation only stores the first code unit of the pad string.

Returns:
the pad grapheme string
See also:
setFormatWidth

getFormatWidth

setPadCharacter

getPadPosition

setPadPosition

virtual EPadPosition DecimalFormat::getPadPosition void   )  [virtual]
 

Get the position at which padding will take place.

This is the location at which padding will be inserted if the result of format() is shorter than the format width.

Returns:
the pad position, one of kPadBeforePrefix, kPadAfterPrefix, kPadBeforeSuffix, or kPadAfterSuffix.
See also:
setFormatWidth

getFormatWidth

setPadCharacter

getPadCharacter

setPadPosition

#kPadBeforePrefix

#kPadAfterPrefix

#kPadBeforeSuffix

#kPadAfterSuffix

UnicodeString& DecimalFormat::getPositivePrefix UnicodeString result  )  const
 

Get the positive prefix.

Examples: +123, $123, sFr123

UnicodeString& DecimalFormat::getPositiveSuffix UnicodeString result  )  const
 

Get the positive suffix.

Example: 123%

virtual double DecimalFormat::getRoundingIncrement void   )  [virtual]
 

Get the rounding increment.

Returns:
A positive rounding increment, or 0.0 if rounding is not in effect.
See also:
setRoundingIncrement

getRoundingMode

setRoundingMode

virtual ERoundingMode DecimalFormat::getRoundingMode void   )  [virtual]
 

Get the rounding mode.

Returns:
A rounding mode
See also:
setRoundingIncrement

getRoundingIncrement

setRoundingMode

int32_t DecimalFormat::getSecondaryGroupingSize void   )  const
 

Return the secondary grouping size.

In some locales one grouping interval is used for the least significant integer digits (the primary grouping size), and another is used for all others (the secondary grouping size). A formatter supporting a secondary grouping size will return a positive integer unequal to the primary grouping size returned by getGroupingSize(). For example, if the primary grouping size is 4, and the secondary grouping size is 2, then the number 123456789 formats as "1,23,45,6789", and the pattern appears as "#,##,###0".

Returns:
the secondary grouping size, or a value less than one if there is none
See also:
setSecondaryGroupingSize

NumberFormat::isGroupingUsed

DecimalFormatSymbols::getGroupingSeparator

static UClassID DecimalFormat::getStaticClassID void   )  [inline, static]
 

Return the class ID for this class.

This is useful only for comparing to a return value from getDynamicClassID(). For example:

 .      Base* polymorphic_pointer = createPolymorphicObject();
 .      if (polymorphic_pointer->getDynamicClassID() ==
 .          Derived::getStaticClassID()) ...
 
Returns:
The class ID for all objects of this class.

Reimplemented from NumberFormat.

UBool DecimalFormat::isDecimalSeparatorAlwaysShown void   )  const
 

Allows you to get the behavior of the decimal separator with integers.

(The decimal separator will always appear with decimals.)

Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345

virtual UBool DecimalFormat::isExponentSignAlwaysShown void   )  [virtual]
 

Return whether the exponent sign is always shown.

Returns:
TRUE if the exponent is always prefixed with either the localized minus sign or the localized plus sign, false if only negative exponents are prefixed with the localized minus sign.
See also:
setScientificNotation

isScientificNotation

setMinimumExponentDigits

getMinimumExponentDigits

setExponentSignAlwaysShown

virtual UBool DecimalFormat::isScientificNotation void   )  [virtual]
 

Return whether or not scientific notation is used.

Returns:
TRUE if this object formats and parses scientific notation
See also:
setScientificNotation

getMinimumExponentDigits

setMinimumExponentDigits

isExponentSignAlwaysShown

setExponentSignAlwaysShown

DecimalFormat& DecimalFormat::operator= const DecimalFormat rhs  ) 
 

Assignment operator.

virtual UBool DecimalFormat::operator== const Format other  )  const [virtual]
 

Return true if the given Format objects are semantically equal.

Objects of different subclasses are considered unequal.

Reimplemented from NumberFormat.

virtual void DecimalFormat::parse const UnicodeString text,
Formattable result,
ParsePosition parsePosition
const [virtual]
 

Parse the given string using this object's choices.

The method does string comparisons to try to find an optimal match. If no object can be parsed, index is unchanged, and NULL is returned. The result is returned as the most parsimonious type of Formattable that will accomodate all of the necessary precision. For example, if the result is exactly 12, it will be returned as a long. However, if it is 1.5, it will be returned as a double.

Parameters:
text The text to be parsed.
result Formattable to be set to the parse result. If parse fails, return contents are undefined.
parsePosition The position to start parsing at on input. On output, moved to after the last successfully parse character. On parse failure, does not change.
See also:
Formattable

Implements NumberFormat.

virtual void DecimalFormat::setDecimalFormatSymbols const DecimalFormatSymbols symbols  )  [virtual]
 

Sets the decimal format symbols, which is generally not changed by the programmer or user.

Parameters:
symbols DecimalFormatSymbols.

virtual void DecimalFormat::setDecimalSeparatorAlwaysShown UBool  newValue  )  [virtual]
 

Allows you to set the behavior of the decimal separator with integers.

(The decimal separator will always appear with decimals.)

Example: Decimal ON: 12345 -> 12345.; OFF: 12345 -> 12345

virtual void DecimalFormat::setExponentSignAlwaysShown UBool  expSignAlways  )  [virtual]
 

Set whether the exponent sign is always shown.

This has no effect unless scientific notation is in use.

Parameters:
expSignAlways TRUE if the exponent is always prefixed with either the localized minus sign or the localized plus sign, false if only negative exponents are prefixed with the localized minus sign.
See also:
setScientificNotation

isScientificNotation

setMinimumExponentDigits

getMinimumExponentDigits

isExponentSignAlwaysShown

virtual void DecimalFormat::setFormatWidth int32_t  width  )  [virtual]
 

Set the width to which the output of format() is padded.

This method also controls whether padding is enabled.

Parameters:
width the width to which to pad the result of format(), or zero to disable padding. A negative width is equivalent to 0.
See also:
getFormatWidth

getPadCharacter

setPadCharacter

getPadPosition

setPadPosition

virtual void DecimalFormat::setGroupingSize int32_t  newValue  )  [virtual]
 

Set the grouping size.

Grouping size is the number of digits between grouping separators in the integer portion of a number. For example, in the number "123,456.78", the grouping size is 3.

See also:
getGroupingSize

NumberFormat::setGroupingUsed

DecimalFormatSymbols::setGroupingSeparator

virtual void DecimalFormat::setMaximumFractionDigits int32_t  newValue  )  [virtual]
 

Sets the maximum number of digits allowed in the fraction portion of a number.

This override limits the fraction digit count to 340.

See also:
NumberFormat::setMaximumFractionDigits

Reimplemented from NumberFormat.

virtual void DecimalFormat::setMaximumIntegerDigits int32_t  newValue  )  [virtual]
 

Sets the maximum number of digits allowed in the integer portion of a number.

This override limits the integer digit count to 309.

See also:
NumberFormat::setMaximumIntegerDigits

Reimplemented from NumberFormat.

virtual void DecimalFormat::setMinimumExponentDigits int8_t  minExpDig  )  [virtual]
 

Set the minimum exponent digits that will be shown.

This has no effect unless scientific notation is in use.

Parameters:
minExpDig a value >= 1 indicating the fewest exponent digits that will be shown. Values less than 1 will be treated as 1.
See also:
setScientificNotation

isScientificNotation

getMinimumExponentDigits

isExponentSignAlwaysShown

setExponentSignAlwaysShown

virtual void DecimalFormat::setMinimumFractionDigits int32_t  newValue  )  [virtual]
 

Sets the minimum number of digits allowed in the fraction portion of a number.

This override limits the fraction digit count to 340.

See also:
NumberFormat::setMinimumFractionDigits

Reimplemented from NumberFormat.

virtual void DecimalFormat::setMinimumIntegerDigits int32_t  newValue  )  [virtual]
 

Sets the minimum number of digits allowed in the integer portion of a number.

This override limits the integer digit count to 309.

See also:
NumberFormat::setMinimumIntegerDigits

Reimplemented from NumberFormat.

virtual void DecimalFormat::setMultiplier int32_t  newValue  )  [virtual]
 

Set the multiplier for use in percent, permill, etc.

For a percentage, set the suffixes to have "%" and the multiplier to be 100. (For Arabic, use arabic percent symbol). For a permill, set the suffixes to have "\u2031" and the multiplier to be 1000.

Examples: with 100, 1.23 -> "123", and "123" -> 1.23

virtual void DecimalFormat::setNegativePrefix const UnicodeString newValue  )  [virtual]
 

Set the negative prefix.

Examples: -123, ($123) (with negative suffix), sFr-123

virtual void DecimalFormat::setNegativeSuffix const UnicodeString newValue  )  [virtual]
 

Set the positive suffix.

Examples: 123%

virtual void DecimalFormat::setPadCharacter UnicodeString  padChar  )  [virtual]
 

Set the grapheme string (a character, possibly with modifier letters) used to pad to the format width.

This has no effect unless padding is enabled. Note: The current implementation only stores the first code unit of the pad string.

Parameters:
padChar the pad grapheme
See also:
setFormatWidth

getFormatWidth

getPadCharacter

getPadPosition

setPadPosition

void DecimalFormat::setPadCharacter UChar  padChar  )  [inline]
 

Set a one-code unit string used to pad to the format width.

This has no effect unless padding is enabled.

Parameters:
padChar the pad character that is used to construct the pad string
See also:
setFormatWidth

getFormatWidth

getPadCharacter

getPadPosition

setPadPosition

Deprecated:
remove after 2000-dec-31.
See setPadCharacter(UnicodeString).

virtual void DecimalFormat::setPadPosition EPadPosition  padPos  )  [virtual]
 

<font face="helvetica" color="red">NEW</font> Set the position at which padding will take place.

This is the location at which padding will be inserted if the result of format() is shorter than the format width. This has no effect unless padding is enabled.

Parameters:
padPos the pad position, one of kPadBeforePrefix, kPadAfterPrefix, kPadBeforeSuffix, or kPadAfterSuffix.
See also:
setFormatWidth

getFormatWidth

setPadCharacter

getPadCharacter

getPadPosition

#kPadBeforePrefix

#kPadAfterPrefix

#kPadBeforeSuffix

#kPadAfterSuffix

virtual void DecimalFormat::setPositivePrefix const UnicodeString newValue  )  [virtual]
 

Set the positive prefix.

Examples: +123, $123, sFr123

virtual void DecimalFormat::setPositiveSuffix const UnicodeString newValue  )  [virtual]
 

Set the positive suffix.

Example: 123%

virtual void DecimalFormat::setRoundingIncrement double  newValue  )  [virtual]
 

Set the rounding increment.

This method also controls whether rounding is enabled.

Parameters:
newValue A positive rounding increment, or 0.0 to disable rounding. Negative increments are equivalent to 0.0.
See also:
getRoundingIncrement

getRoundingMode

setRoundingMode

virtual void DecimalFormat::setRoundingMode ERoundingMode  roundingMode  )  [virtual]
 

Set the rounding mode.

This has no effect unless the rounding increment is greater than zero.

Parameters:
roundingMode A rounding mode
See also:
setRoundingIncrement

getRoundingIncrement

getRoundingMode

virtual void DecimalFormat::setScientificNotation UBool  useScientific  )  [virtual]
 

Set whether or not scientific notation is used.

Parameters:
useScientific TRUE if this object formats and parses scientific notation
See also:
isScientificNotation

getMinimumExponentDigits

setMinimumExponentDigits

isExponentSignAlwaysShown

setExponentSignAlwaysShown

virtual void DecimalFormat::setSecondaryGroupingSize int32_t  newValue  )  [virtual]
 

Set the secondary grouping size.

If set to a value less than 1, then secondary grouping is turned off, and the primary grouping size is used for all intervals, not just the least significant.

See also:
getSecondaryGroupingSize

NumberFormat::setGroupingUsed

DecimalFormatSymbols::setGroupingSeparator

virtual UnicodeString& DecimalFormat::toLocalizedPattern UnicodeString result  )  const [virtual]
 

Synthesizes a localized pattern string that represents the current state of this Format object.

See also:
applyPattern

virtual UnicodeString& DecimalFormat::toPattern UnicodeString result  )  const [virtual]
 

Synthesizes a pattern string that represents the current state of this Format object.

See also:
applyPattern


Field Documentation

const char DecimalFormat::fgNumberPatterns[] [static]
 

The resource tags we use to retrieve decimal format data from locale resource bundles.


The documentation for this class was generated from the following file:
Generated on Mon May 23 13:34:43 2005 for ICU 2.1 by  doxygen 1.4.2