- All Implemented Interfaces:
Serializable,Cloneable
DecimalFormat is a concrete subclass of
NumberFormat that formats decimal numbers. It has a variety of
features designed to make it possible to parse and format numbers in any
locale, including support for Western, Arabic, and Indic digits. It also
supports different kinds of numbers, including integers (123), fixed-point
numbers (123.4), scientific notation (1.23E4), percentages (12%), and
currency amounts ($123). All of these can be localized.
To obtain a NumberFormat for a specific locale, including the
default locale, call one of NumberFormat's factory methods, such
as getInstance(). In general, do not call the
DecimalFormat constructors directly, since the
NumberFormat factory methods may return subclasses other than
DecimalFormat. If you need to customize the format object, do
something like this:
NumberFormat f = NumberFormat.getInstance(loc);
if (f instanceof DecimalFormat) {
((DecimalFormat) f).setDecimalSeparatorAlwaysShown(true);
}
A DecimalFormat comprises a pattern and a set of
symbols. The pattern may be set directly using
applyPattern(), or indirectly using the API methods. The
symbols are stored in a DecimalFormatSymbols object. When using
the NumberFormat factory methods, the pattern and symbols are
read from localized ResourceBundles.
Patterns
DecimalFormat patterns have the following syntax:
Pattern:
PositivePattern
PositivePattern ; NegativePattern
PositivePattern:
Prefixopt Number Suffixopt
NegativePattern:
Prefixopt Number Suffixopt
Prefix:
any Unicode characters except \uFFFE, \uFFFF, and special characters
Suffix:
any Unicode characters except \uFFFE, \uFFFF, and special characters
Number:
Integer Exponentopt
Integer . Fraction Exponentopt
Integer:
MinimumInteger
#
# Integer
# , Integer
MinimumInteger:
0
0 MinimumInteger
0 , MinimumInteger
Fraction:
MinimumFractionopt OptionalFractionopt
MinimumFraction:
0 MinimumFractionopt
OptionalFraction:
# OptionalFractionopt
Exponent:
E MinimumExponent
MinimumExponent:
0 MinimumExponentopt
A DecimalFormat pattern contains a positive and negative
subpattern, for example, "#,##0.00;(#,##0.00)". Each
subpattern has a prefix, numeric part, and suffix. The negative subpattern
is optional; if absent, then the positive subpattern prefixed with the
minus sign ('-' U+002D HYPHEN-MINUS) is used as the
negative subpattern. That is, "0.00" alone is equivalent to
"0.00;-0.00". If there is an explicit negative subpattern, it
serves only to specify the negative prefix and suffix; the number of digits,
minimal digits, and other characteristics are all the same as the positive
pattern. That means that "#,##0.0#;(#)" produces precisely
the same behavior as "#,##0.0#;(#,##0.0#)".
The prefixes, suffixes, and various symbols used for infinity, digits,
grouping separators, decimal separators, etc. may be set to arbitrary
values, and they will appear properly during formatting. However, care must
be taken that the symbols and strings do not conflict, or parsing will be
unreliable. For example, either the positive and negative prefixes or the
suffixes must be distinct for DecimalFormat.parse() to be able
to distinguish positive from negative values. (If they are identical, then
DecimalFormat will behave as if no negative subpattern was
specified.) Another example is that the decimal separator and grouping
separator should be distinct characters, or parsing will be impossible.
The grouping separator is commonly used for thousands, but in some
countries it separates ten-thousands. The grouping size is a constant number
of digits between the grouping characters, such as 3 for 100,000,000 or 4 for
1,0000,0000. If you supply a pattern with multiple grouping characters, the
interval between the last one and the end of the integer is the one that is
used. So "#,##,###,####" == "######,####" ==
"##,####,####".
Special Pattern Characters
Many characters in a pattern are taken literally; they are matched during parsing and output unchanged during formatting. Special characters, on the other hand, stand for other characters, strings, or classes of characters. They must be quoted, unless noted otherwise, if they are to appear in the prefix or suffix as literals.
The characters listed here are used in non-localized patterns. Localized
patterns use the corresponding characters taken from this formatter's
DecimalFormatSymbols object instead, and these characters lose
their special status. Two exceptions are the currency sign and quote, which
are not localized.
Symbol Location Localized? Meaning 0Number Yes Digit #Number Yes Digit, zero shows as absent .Number Yes Decimal separator or monetary decimal separator -Number Yes Minus sign ,Number Yes Grouping separator or monetary grouping separator ENumber Yes Separates mantissa and exponent in scientific notation. Need not be quoted in prefix or suffix. ;Subpattern boundary Yes Separates positive and negative subpatterns %Prefix or suffix Yes Multiply by 100 and show as percentage \u2030Prefix or suffix Yes Multiply by 1000 and show as per mille value ¤(\u00A4)Prefix or suffix No Currency sign, replaced by currency symbol. If doubled, replaced by international currency symbol. If present in a pattern, the monetary decimal/grouping separators are used instead of the decimal/grouping separators. 'Prefix or suffix No Used to quote special characters in a prefix or suffix, for example, "'#'#"formats 123 to"#123". To create a single quote itself, use two in a row:"# o''clock".
Scientific Notation
Numbers in scientific notation are expressed as the product of a mantissa
and a power of ten, for example, 1234 can be expressed as 1.234 x 10^3. The
mantissa is often in the range 1.0 ≤ x < 10.0, but it need not
be.
DecimalFormat can be instructed to format and parse scientific
notation only via a pattern; there is currently no factory method
that creates a scientific notation format. In a pattern, the exponent
character immediately followed by one or more digit characters indicates
scientific notation. Example: "0.###E0" formats the number
1234 as "1.234E3".
- The number of digit characters after the exponent character gives the
minimum exponent digit count. There is no maximum. Negative exponents are
formatted using the localized minus sign, not the prefix and suffix
from the pattern. This allows patterns such as
"0.###E0 m/s". - The minimum and maximum number of integer digits are interpreted
together:
- If the maximum number of integer digits is greater than their minimum number
and greater than 1, it forces the exponent to be a multiple of the maximum
number of integer digits, and the minimum number of integer digits to be
interpreted as 1. The most common use of this is to generate
engineering notation, in which the exponent is a multiple of three,
e.g.,
"##0.#####E0". Using this pattern, the number 12345 formats to"12.345E3", and 123456 formats to"123.456E3". - Otherwise, the minimum number of integer digits is achieved by adjusting the
exponent. Example: 0.00123 formatted with
"00.###E0"yields"12.3E-4".
- If the maximum number of integer digits is greater than their minimum number
and greater than 1, it forces the exponent to be a multiple of the maximum
number of integer digits, and the minimum number of integer digits to be
interpreted as 1. The most common use of this is to generate
engineering notation, in which the exponent is a multiple of three,
e.g.,
- The number of significant digits in the mantissa is the sum of the
minimum integer and maximum fraction digits, and is
unaffected by the maximum integer digits. For example, 12345 formatted with
"##0.##E0"is"12.3E3". To show all digits, set the significant digits count to zero. The number of significant digits does not affect parsing. - Exponential patterns may not contain grouping separators.
Rounding
DecimalFormat provides rounding modes defined in
RoundingMode for formatting. By default, it uses
RoundingMode.HALF_EVEN.
Digits
For formatting,DecimalFormat uses the ten consecutive
characters starting with the localized zero digit defined in the
DecimalFormatSymbols object as digits. For parsing, these
digits as well as all Unicode decimal digits, as defined by
Character.digit, are recognized.
Special Values
NaN is formatted as a string, which typically has a single character
\uFFFD. This string is determined by the
DecimalFormatSymbols object. This is the only value for which
the prefixes and suffixes are not used.
Infinity is formatted as a string, which typically has a single character
\u221E, with the positive or negative prefixes and suffixes
applied. The infinity string is determined by the
DecimalFormatSymbols object.
Negative zero ("-0") parses to
BigDecimal(0)ifisParseBigDecimal()is true,Long(0)ifisParseBigDecimal()is false andisParseIntegerOnly()is true,Double(-0.0)if bothisParseBigDecimal()andisParseIntegerOnly()are false.
Synchronization
Decimal formats are generally not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally.
Example
// Print out a number using the localized number, integer, currency, // and percent format for each localeLocale[] locales = NumberFormat.getAvailableLocales(); double myNumber = -1234.56; NumberFormat form; for (int j = 0; j < 4; ++j) { System.out.println("FORMAT"); for (int i = 0; i < locales.length; ++i) { if (locales[i].getCountry().length() == 0) { continue; // Skip language-only locales } System.out.print(locales[i].getDisplayName()); switch (j) { case 0: form = NumberFormat.getInstance(locales[i]); break; case 1: form = NumberFormat.getIntegerInstance(locales[i]); break; case 2: form = NumberFormat.getCurrencyInstance(locales[i]); break; default: form = NumberFormat.getPercentInstance(locales[i]); break; } if (form instanceof DecimalFormat) { System.out.print(": " + ((DecimalFormat) form).toPattern()); } System.out.print(" -> " + form.format(myNumber)); try { System.out.println(" -> " + form.parse(form.format(myNumber))); } catch (ParseException e) {} } }
- Since:
- 1.1
- See Also:
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Nested Class Summary
Nested classes/interfaces declared in class java.text.NumberFormat
NumberFormat.Field, NumberFormat.Style -
Field Summary
Fields declared in class java.text.NumberFormat
FRACTION_FIELD, INTEGER_FIELD -
Constructor Summary
ConstructorsConstructorDescriptionCreates a DecimalFormat using the default pattern and symbols for the defaultFORMATlocale.DecimalFormat(String pattern) Creates a DecimalFormat using the given pattern and the symbols for the defaultFORMATlocale.DecimalFormat(String pattern, DecimalFormatSymbols symbols) Creates a DecimalFormat using the given pattern and symbols. -
Method Summary
Modifier and TypeMethodDescriptionvoidapplyLocalizedPattern(String pattern) Apply the given pattern to this Format object.voidapplyPattern(String pattern) Apply the given pattern to this Format object.clone()Standard override; no change in semantics.booleanOverrides equalsformat(double number, StringBuffer result, FieldPosition fieldPosition) Formats a double to produce a string.format(long number, StringBuffer result, FieldPosition fieldPosition) Format a long to produce a string.final StringBufferformat(Object number, StringBuffer toAppendTo, FieldPosition pos) Formats a number and appends the resulting text to the given string buffer.Formats an Object producing anAttributedCharacterIterator.Gets the currency used by this decimal format when formatting currency values.Returns a copy of the decimal format symbols, which is generally not changed by the programmer or user.intReturn the grouping size.intGets the maximum number of digits allowed in the fraction portion of a number.intGets the maximum number of digits allowed in the integer portion of a number.intGets the minimum number of digits allowed in the fraction portion of a number.intGets the minimum number of digits allowed in the integer portion of a number.intGets the multiplier for use in percent, per mille, and similar formats.Get the negative prefix.Get the negative suffix.Get the positive prefix.Get the positive suffix.Gets theRoundingModeused in this DecimalFormat.inthashCode()Overrides hashCodebooleanAllows you to get the behavior of the decimal separator with integers.booleanReturns whether theparse(java.lang.String, java.text.ParsePosition)method returnsBigDecimal.parse(String text, ParsePosition pos) Parses text from a string to produce aNumber.voidsetCurrency(Currency currency) Sets the currency used by this number format when formatting currency values.voidsetDecimalFormatSymbols(DecimalFormatSymbols newSymbols) Sets the decimal format symbols, which is generally not changed by the programmer or user.voidsetDecimalSeparatorAlwaysShown(boolean newValue) Allows you to set the behavior of the decimal separator with integers.voidsetGroupingSize(int newValue) Set the grouping size.voidsetMaximumFractionDigits(int newValue) Sets the maximum number of digits allowed in the fraction portion of a number.voidsetMaximumIntegerDigits(int newValue) Sets the maximum number of digits allowed in the integer portion of a number.voidsetMinimumFractionDigits(int newValue) Sets the minimum number of digits allowed in the fraction portion of a number.voidsetMinimumIntegerDigits(int newValue) Sets the minimum number of digits allowed in the integer portion of a number.voidsetMultiplier(int newValue) Sets the multiplier for use in percent, per mille, and similar formats.voidsetNegativePrefix(String newValue) Set the negative prefix.voidsetNegativeSuffix(String newValue) Set the negative suffix.voidsetParseBigDecimal(boolean newValue) Sets whether theparse(java.lang.String, java.text.ParsePosition)method returnsBigDecimal.voidsetPositivePrefix(String newValue) Set the positive prefix.voidsetPositiveSuffix(String newValue) Set the positive suffix.voidsetRoundingMode(RoundingMode roundingMode) Sets theRoundingModeused in this DecimalFormat.Synthesizes a localized pattern string that represents the current state of this Format object.Synthesizes a pattern string that represents the current state of this Format object.Methods declared in class java.text.NumberFormat
format, format, getAvailableLocales, getCompactNumberInstance, getCompactNumberInstance, getCurrencyInstance, getCurrencyInstance, getInstance, getInstance, getIntegerInstance, getIntegerInstance, getNumberInstance, getNumberInstance, getPercentInstance, getPercentInstance, isGroupingUsed, isParseIntegerOnly, parse, parseObject, setGroupingUsed, setParseIntegerOnlyMethods declared in class java.text.Format
format, parseObject
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Constructor Details
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DecimalFormat
public DecimalFormat()Creates a DecimalFormat using the default pattern and symbols for the defaultFORMATlocale. 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.
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DecimalFormat
Creates a DecimalFormat using the given pattern and the symbols for the defaultFORMATlocale. 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.- Throws:
NullPointerException- ifpatternis nullIllegalArgumentException- if the given pattern is invalid.- See Also:
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DecimalFormat
Creates a DecimalFormat using 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 stringsymbols- the set of symbols to be used- Throws:
NullPointerException- if any of the given arguments is nullIllegalArgumentException- if the given pattern is invalid- See Also:
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Method Details
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format
Formats a number and appends the resulting text to the given string buffer. The number can be of any subclass ofNumber.This implementation uses the maximum precision permitted.
- Overrides:
formatin classNumberFormat- Parameters:
number- the number to formattoAppendTo- theStringBufferto which the formatted text is to be appendedpos- keeps track on the position of the field within the returned string. For example, for formatting a number1234567.89inLocale.USlocale, if the givenfieldPositionisNumberFormat.INTEGER_FIELD, the begin index and end index offieldPositionwill be set to 0 and 9, respectively for the output string1,234,567.89.- Returns:
- the value passed in as
toAppendTo - Throws:
IllegalArgumentException- ifnumberis null or not an instance ofNumber.NullPointerException- iftoAppendToorposis nullArithmeticException- if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY- See Also:
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format
Formats a double to produce a string.- Specified by:
formatin classNumberFormat- Parameters:
number- The double to formatresult- where the text is to be appendedfieldPosition- keeps track on the position of the field within the returned string. For example, for formatting a number1234567.89inLocale.USlocale, if the givenfieldPositionisNumberFormat.INTEGER_FIELD, the begin index and end index offieldPositionwill be set to 0 and 9, respectively for the output string1,234,567.89.- Returns:
- The formatted number string
- Throws:
NullPointerException- ifresultorfieldPositionisnullArithmeticException- if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY- See Also:
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format
Format a long to produce a string.- Specified by:
formatin classNumberFormat- Parameters:
number- The long to formatresult- where the text is to be appendedfieldPosition- keeps track on the position of the field within the returned string. For example, for formatting a number123456789inLocale.USlocale, if the givenfieldPositionisNumberFormat.INTEGER_FIELD, the begin index and end index offieldPositionwill be set to 0 and 11, respectively for the output string123,456,789.- Returns:
- The formatted number string
- Throws:
NullPointerException- ifresultorfieldPositionisnullArithmeticException- if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY- See Also:
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formatToCharacterIterator
Formats an Object producing anAttributedCharacterIterator. You can use the returnedAttributedCharacterIteratorto build the resulting String, as well as to determine information about the resulting String.Each attribute key of the AttributedCharacterIterator will be of type
NumberFormat.Field, with the attribute value being the same as the attribute key.- Overrides:
formatToCharacterIteratorin classFormat- Parameters:
obj- The object to format- Returns:
- AttributedCharacterIterator describing the formatted value.
- Throws:
NullPointerException- if obj is null.IllegalArgumentException- when the Format cannot format the given object.ArithmeticException- if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY- Since:
- 1.4
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parse
Parses text from a string to produce aNumber.The method attempts to parse text starting at the index given by
pos. If parsing succeeds, then the index ofposis updated to the index after the last character used (parsing does not necessarily use all characters up to the end of the string), and the parsed number is returned. The updatedposcan be used to indicate the starting point for the next call to this method. If an error occurs, then the index ofposis not changed, the error index ofposis set to the index of the character where the error occurred, and null is returned.The subclass returned depends on the value of
isParseBigDecimal()as well as on the string being parsed.- If
isParseBigDecimal()is false (the default), most integer values are returned asLongobjects, no matter how they are written:"17"and"17.000"both parse toLong(17). Values that cannot fit into aLongare returned asDoubles. This includes values with a fractional part, infinite values,NaN, and the value -0.0.DecimalFormatdoes not decide whether to return aDoubleor aLongbased on the presence of a decimal separator in the source string. Doing so would prevent integers that overflow the mantissa of a double, such as"-9,223,372,036,854,775,808.00", from being parsed accurately.Callers may use the
NumbermethodsdoubleValue,longValue, etc., to obtain the type they want. - If
isParseBigDecimal()is true, values are returned asBigDecimalobjects. The values are the ones constructed byBigDecimal(String)for corresponding strings in locale-independent format. The special cases negative and positive infinity and NaN are returned asDoubleinstances holding the values of the correspondingDoubleconstants.
DecimalFormatparses all Unicode characters that represent decimal digits, as defined byCharacter.digit(). In addition,DecimalFormatalso recognizes as digits the ten consecutive characters starting with the localized zero digit defined in theDecimalFormatSymbolsobject.- Specified by:
parsein classNumberFormat- Parameters:
text- the string to be parsedpos- AParsePositionobject with index and error index information as described above.- Returns:
- the parsed value, or
nullif the parse fails - Throws:
NullPointerException- iftextorposis null.- See Also:
- If
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getDecimalFormatSymbols
Returns a copy of the decimal format symbols, which is generally not changed by the programmer or user.- Returns:
- a copy of the desired DecimalFormatSymbols
- See Also:
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setDecimalFormatSymbols
Sets the decimal format symbols, which is generally not changed by the programmer or user.- Parameters:
newSymbols- desired DecimalFormatSymbols- See Also:
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getPositivePrefix
Get the positive prefix.Examples: +123, $123, sFr123
- Returns:
- the positive prefix
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setPositivePrefix
Set the positive prefix.Examples: +123, $123, sFr123
- Parameters:
newValue- the new positive prefix
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getNegativePrefix
Get the negative prefix.Examples: -123, ($123) (with negative suffix), sFr-123
- Returns:
- the negative prefix
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setNegativePrefix
Set the negative prefix.Examples: -123, ($123) (with negative suffix), sFr-123
- Parameters:
newValue- the new negative prefix
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getPositiveSuffix
Get the positive suffix.Example: 123%
- Returns:
- the positive suffix
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setPositiveSuffix
Set the positive suffix.Example: 123%
- Parameters:
newValue- the new positive suffix
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getNegativeSuffix
Get the negative suffix.Examples: -123%, ($123) (with positive suffixes)
- Returns:
- the negative suffix
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setNegativeSuffix
Set the negative suffix.Examples: 123%
- Parameters:
newValue- the new negative suffix
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getMultiplier
public int getMultiplier()Gets the multiplier for use in percent, per mille, and similar formats.- Returns:
- the multiplier
- See Also:
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setMultiplier
public void setMultiplier(int newValue) Sets the multiplier for use in percent, per mille, and similar formats. For a percent format, set the multiplier to 100 and the suffixes to have '%' (for Arabic, use the Arabic percent sign). For a per mille format, set the multiplier to 1000 and the suffixes to have '\u2030'.Example: with multiplier 100, 1.23 is formatted as "123", and "123" is parsed into 1.23.
- Parameters:
newValue- the new multiplier- See Also:
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getGroupingSize
public int getGroupingSize()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. Grouping size of zero designates that grouping is not used, which provides the same formatting as if callingsetGroupingUsed(false).- Returns:
- the grouping size
- See Also:
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setGroupingSize
public void setGroupingSize(int newValue) 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. Grouping size of zero designates that grouping is not used, which provides the same formatting as if callingsetGroupingUsed(false).The value passed in is converted to a byte, which may lose information. Values that are negative or greater than
Byte.MAX_VALUE, will throw anIllegalArgumentException.- Parameters:
newValue- the new grouping size- Throws:
IllegalArgumentException- ifnewValueis negative or greater thanByte.MAX_VALUE- See Also:
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isDecimalSeparatorAlwaysShown
public boolean isDecimalSeparatorAlwaysShown()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
- Returns:
trueif the decimal separator is always shown;falseotherwise
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setDecimalSeparatorAlwaysShown
public void setDecimalSeparatorAlwaysShown(boolean newValue) 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
- Parameters:
newValue-trueif the decimal separator is always shown;falseotherwise
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isParseBigDecimal
public boolean isParseBigDecimal()Returns whether theparse(java.lang.String, java.text.ParsePosition)method returnsBigDecimal. The default value is false.- Returns:
trueif the parse method returns BigDecimal;falseotherwise- Since:
- 1.5
- See Also:
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setParseBigDecimal
public void setParseBigDecimal(boolean newValue) Sets whether theparse(java.lang.String, java.text.ParsePosition)method returnsBigDecimal.- Parameters:
newValue-trueif the parse method returns BigDecimal;falseotherwise- Since:
- 1.5
- See Also:
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clone
Standard override; no change in semantics.- Overrides:
clonein classNumberFormat- Returns:
- a clone of this instance.
- See Also:
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equals
Overrides equals- Overrides:
equalsin classNumberFormat- Parameters:
obj- the reference object with which to compare.- Returns:
trueif this object is the same as the obj argument;falseotherwise.- See Also:
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hashCode
public int hashCode()Overrides hashCode- Overrides:
hashCodein classNumberFormat- Returns:
- a hash code value for this object.
- See Also:
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toPattern
Synthesizes a pattern string that represents the current state of this Format object.- Returns:
- a pattern string
- See Also:
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toLocalizedPattern
Synthesizes a localized pattern string that represents the current state of this Format object.- Returns:
- a localized pattern string
- See Also:
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applyPattern
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 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#"→ 1,234.56This 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 parentheses.In negative patterns, the minimum and maximum counts are ignored; these are presumed to be set in the positive pattern.
- Parameters:
pattern- a new pattern- Throws:
NullPointerException- ifpatternis nullIllegalArgumentException- if the given pattern is invalid.
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applyLocalizedPattern
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 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#"→ 1,234.56This 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 parentheses.In negative patterns, the minimum and maximum counts are ignored; these are presumed to be set in the positive pattern.
- Parameters:
pattern- a new pattern- Throws:
NullPointerException- ifpatternis nullIllegalArgumentException- if the given pattern is invalid.
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setMaximumIntegerDigits
public void setMaximumIntegerDigits(int newValue) Sets the maximum number of digits allowed in the integer portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower ofnewValueand 309 is used. Negative input values are replaced with 0.- Overrides:
setMaximumIntegerDigitsin classNumberFormat- Parameters:
newValue- the maximum number of integer digits to be shown; if less than zero, then zero is used. The concrete subclass may enforce an upper limit to this value appropriate to the numeric type being formatted.- See Also:
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setMinimumIntegerDigits
public void setMinimumIntegerDigits(int newValue) Sets the minimum number of digits allowed in the integer portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower ofnewValueand 309 is used. Negative input values are replaced with 0.- Overrides:
setMinimumIntegerDigitsin classNumberFormat- Parameters:
newValue- the minimum number of integer digits to be shown; if less than zero, then zero is used. The concrete subclass may enforce an upper limit to this value appropriate to the numeric type being formatted.- See Also:
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setMaximumFractionDigits
public void setMaximumFractionDigits(int newValue) Sets the maximum number of digits allowed in the fraction portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower ofnewValueand 340 is used. Negative input values are replaced with 0.- Overrides:
setMaximumFractionDigitsin classNumberFormat- Parameters:
newValue- the maximum number of fraction digits to be shown; if less than zero, then zero is used. The concrete subclass may enforce an upper limit to this value appropriate to the numeric type being formatted.- See Also:
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setMinimumFractionDigits
public void setMinimumFractionDigits(int newValue) Sets the minimum number of digits allowed in the fraction portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower ofnewValueand 340 is used. Negative input values are replaced with 0.- Overrides:
setMinimumFractionDigitsin classNumberFormat- Parameters:
newValue- the minimum number of fraction digits to be shown; if less than zero, then zero is used. The concrete subclass may enforce an upper limit to this value appropriate to the numeric type being formatted.- See Also:
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getMaximumIntegerDigits
public int getMaximumIntegerDigits()Gets the maximum number of digits allowed in the integer portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower of the return value and 309 is used.- Overrides:
getMaximumIntegerDigitsin classNumberFormat- Returns:
- the maximum number of digits
- See Also:
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getMinimumIntegerDigits
public int getMinimumIntegerDigits()Gets the minimum number of digits allowed in the integer portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower of the return value and 309 is used.- Overrides:
getMinimumIntegerDigitsin classNumberFormat- Returns:
- the minimum number of digits
- See Also:
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getMaximumFractionDigits
public int getMaximumFractionDigits()Gets the maximum number of digits allowed in the fraction portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower of the return value and 340 is used.- Overrides:
getMaximumFractionDigitsin classNumberFormat- Returns:
- the maximum number of digits.
- See Also:
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getMinimumFractionDigits
public int getMinimumFractionDigits()Gets the minimum number of digits allowed in the fraction portion of a number. For formatting numbers other thanBigIntegerandBigDecimalobjects, the lower of the return value and 340 is used.- Overrides:
getMinimumFractionDigitsin classNumberFormat- Returns:
- the minimum number of digits
- See Also:
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getCurrency
Gets the currency used by this decimal format when formatting currency values. The currency is obtained by callingDecimalFormatSymbols.getCurrencyon this number format's symbols.- Overrides:
getCurrencyin classNumberFormat- Returns:
- the currency used by this decimal format, or
null - Since:
- 1.4
-
setCurrency
Sets the currency used by this number format when formatting currency values. This does not update the minimum or maximum number of fraction digits used by the number format. The currency is set by callingDecimalFormatSymbols.setCurrencyon this number format's symbols.- Overrides:
setCurrencyin classNumberFormat- Parameters:
currency- the new currency to be used by this decimal format- Throws:
NullPointerException- ifcurrencyis null- Since:
- 1.4
-
getRoundingMode
Gets theRoundingModeused in this DecimalFormat.- Overrides:
getRoundingModein classNumberFormat- Returns:
- The
RoundingModeused for this DecimalFormat. - Since:
- 1.6
- See Also:
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setRoundingMode
Sets theRoundingModeused in this DecimalFormat.- Overrides:
setRoundingModein classNumberFormat- Parameters:
roundingMode- TheRoundingModeto be used- Throws:
NullPointerException- ifroundingModeis null.- Since:
- 1.6
- See Also:
-