Added in API level 1

Summary: Nested Classes | Constants | Protected Ctors | Methods | Inherited Methods

NumberFormat

public abstract class NumberFormat
extends Format

java.lang.Object
↳	java.text.Format
	↳	java.text.NumberFormat

Known direct subclasses ChoiceFormat, DecimalFormat ChoiceFormat A ChoiceFormat allows you to attach a format to a range of numbers.  DecimalFormat DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers.

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NumberFormat is the abstract base class for all number formats. This class provides the interface for formatting and parsing numbers. NumberFormat also provides methods for determining which locales have number formats, and what their names are.

NumberFormat helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal.

To format a number for the current Locale, use one of the factory class methods:

myString = NumberFormat.getInstance().format(myNumber);
 

If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.

NumberFormat nf = NumberFormat.getInstance();
 for (int i = 0; i < myNumber.length; ++i) {
     output.println(nf.format(myNumber[i]) + "; ");
 }
 

To format a number for a different Locale, specify it in the call to getInstance.

NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH);
 

If the locale contains "nu" (numbers) Unicode extensions, the decimal digits, and/or the country used for formatting are overridden.

You can also use a NumberFormat to parse numbers:

myNumber = nf.parse(myString);
 

Use getInstance or getNumberInstance to get the normal number format. Use getIntegerInstance to get an integer number format. Use getCurrencyInstance to get the currency number format. Use getCompactNumberInstance to get the compact number format to format a number in shorter form. For example, 2000 can be formatted as "2K" in US locale. Use getPercentInstance to get a format for displaying percentages. With this format, a fraction like 0.53 is displayed as 53%.

You can also control the display of numbers with such methods as setMinimumFractionDigits. If you want even more control over the format or parsing, or want to give your users more control, you can try casting the NumberFormat you get from the factory methods to a DecimalFormat or CompactNumberFormat depending on the factory method used. This will work for the vast majority of locales; just remember to put it in a try block in case you encounter an unusual one.

NumberFormat and DecimalFormat are designed such that some controls work for formatting and others work for parsing. The following is the detailed description for each these control methods,

setParseIntegerOnly : only affects parsing, e.g. if true, "3456.78" → 3456 (and leaves the parse position just after index 6) if false, "3456.78" → 3456.78 (and leaves the parse position just after index 8) This is independent of formatting. If you want to not show a decimal point where there might be no digits after the decimal point, use setDecimalSeparatorAlwaysShown.

setDecimalSeparatorAlwaysShown : only affects formatting, and only where there might be no digits after the decimal point, such as with a pattern like "#,##0.##", e.g., if true, 3456.00 → "3,456." if false, 3456.00 → "3456" This is independent of parsing. If you want parsing to stop at the decimal point, use setParseIntegerOnly.

You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to:

• progressively parse through pieces of a string
• align the decimal point and other areas

For example, you can align numbers in two ways:

1. If you are using a monospaced font with spacing for alignment, you can pass the FieldPosition in your format call, with field = INTEGER_FIELD. On output, getEndIndex will be set to the offset between the last character of the integer and the decimal. Add (desiredSpaceCount - getEndIndex) spaces at the front of the string.
2. If you are using proportional fonts, instead of padding with spaces, measure the width of the string in pixels from the start to getEndIndex. Then move the pen by (desiredPixelWidth - widthToAlignmentPoint) before drawing the text. It also works where there is no decimal, but possibly additional characters at the end, e.g., with parentheses in negative numbers: "(12)" for -12.

Synchronization

Number 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.

See also:

• DecimalFormat
• ChoiceFormat

Summary

Nested classes
class	NumberFormat.Field Defines constants that are used as attribute keys in the AttributedCharacterIterator returned from NumberFormat.formatToCharacterIterator and as field identifiers in FieldPosition.

Constants
int	FRACTION_FIELD Field constant used to construct a FieldPosition object.
int	INTEGER_FIELD Field constant used to construct a FieldPosition object.

Protected constructors
NumberFormat() Sole constructor.

Public methods
Object	clone() Overrides Cloneable.
boolean	equals(Object obj) Overrides equals.
StringBuffer	format(Object number, StringBuffer toAppendTo, FieldPosition pos) Formats a number and appends the resulting text to the given string buffer.
final String	format(double number) Specialization of format.
abstract StringBuffer	format(double number, StringBuffer toAppendTo, FieldPosition pos) Specialization of format.
final String	format(long number) Specialization of format.
abstract StringBuffer	format(long number, StringBuffer toAppendTo, FieldPosition pos) Specialization of format.
static Locale[]	getAvailableLocales() Returns a scientific format for the current default locale.
Currency	getCurrency() Gets the currency used by this number format when formatting currency values.
static NumberFormat	getCurrencyInstance(Locale inLocale) Returns a currency format for the specified locale.
static final NumberFormat	getCurrencyInstance() Returns a currency format for the current default FORMAT locale.
static final NumberFormat	getInstance() Returns a general-purpose number format for the current default FORMAT locale.
static NumberFormat	getInstance(Locale inLocale) Returns a general-purpose number format for the specified locale.
static final NumberFormat	getIntegerInstance() Returns an integer number format for the current default FORMAT locale.
static NumberFormat	getIntegerInstance(Locale inLocale) Returns an integer number format for the specified locale.
int	getMaximumFractionDigits() Returns the maximum number of digits allowed in the fraction portion of a number.
int	getMaximumIntegerDigits() Returns the maximum number of digits allowed in the integer portion of a number.
int	getMinimumFractionDigits() Returns the minimum number of digits allowed in the fraction portion of a number.
int	getMinimumIntegerDigits() Returns the minimum number of digits allowed in the integer portion of a number.
static final NumberFormat	getNumberInstance() Returns a general-purpose number format for the current default FORMAT locale.
static NumberFormat	getNumberInstance(Locale inLocale) Returns a general-purpose number format for the specified locale.
static NumberFormat	getPercentInstance(Locale inLocale) Returns a percentage format for the specified locale.
static final NumberFormat	getPercentInstance() Returns a percentage format for the current default FORMAT locale.
RoundingMode	getRoundingMode() Gets the RoundingMode used in this NumberFormat.
int	hashCode() Overrides hashCode.
boolean	isGroupingUsed() Returns true if grouping is used in this format.
boolean	isParseIntegerOnly() Returns true if this format will parse numbers as integers only.
Number	parse(String source) Parses text from the beginning of the given string to produce a number.
abstract Number	parse(String source, ParsePosition parsePosition) Returns a Long if possible (e.g., within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals), otherwise a Double.
final Object	parseObject(String source, ParsePosition pos) Parses text from a string to produce a Number.
void	setCurrency(Currency currency) Sets the currency used by this number format when formatting currency values.
void	setGroupingUsed(boolean newValue) Set whether or not grouping will be used in this format.
void	setMaximumFractionDigits(int newValue) Sets the maximum number of digits allowed in the fraction portion of a number.
void	setMaximumIntegerDigits(int newValue) Sets the maximum number of digits allowed in the integer portion of a number.
void	setMinimumFractionDigits(int newValue) Sets the minimum number of digits allowed in the fraction portion of a number.
void	setMinimumIntegerDigits(int newValue) Sets the minimum number of digits allowed in the integer portion of a number.
void	setParseIntegerOnly(boolean value) Sets whether or not numbers should be parsed as integers only.
void	setRoundingMode(RoundingMode roundingMode) Sets the RoundingMode used in this NumberFormat.

Inherited methods
From class java.text.Format Object clone() Creates and returns a copy of this object. final String format(Object obj) Formats an object to produce a string. abstract StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) Formats an object and appends the resulting text to a given string buffer. AttributedCharacterIterator formatToCharacterIterator(Object obj) Formats an Object producing an AttributedCharacterIterator. Object parseObject(String source) Parses text from the beginning of the given string to produce an object. abstract Object parseObject(String source, ParsePosition pos) Parses text from a string to produce an object.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Constants

FRACTION_FIELD

Added in API level 1

public static final int FRACTION_FIELD

Field constant used to construct a FieldPosition object. Signifies that the position of the fraction part of a formatted number should be returned.

See also:

• FieldPosition

Constant Value: 1 (0x00000001)

INTEGER_FIELD

Added in API level 1

public static final int INTEGER_FIELD

Field constant used to construct a FieldPosition object. Signifies that the position of the integer part of a formatted number should be returned.

See also:

• FieldPosition

Constant Value: 0 (0x00000000)

Protected constructors

NumberFormat

Added in API level 1

protected NumberFormat ()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Public methods

clone

Added in API level 1

public Object clone ()

Overrides Cloneable.

Returns
Object	a clone of this instance.

equals

Added in API level 1

public boolean equals (Object obj)

Overrides equals.

Parameters
obj	Object: the reference object with which to compare.

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

format

Added in API level 1

public StringBuffer format (Object number, 
                StringBuffer toAppendTo, 
                FieldPosition pos)

Formats a number and appends the resulting text to the given string buffer. The number can be of any subclass of Number.

This implementation extracts the number's value using Number.longValue() for all integral type values that can be converted to long without loss of information, including BigInteger values with a bit length of less than 64, and Number.doubleValue() for all other types. It then calls format(long, java.lang.StringBuffer, java.text.FieldPosition) or format(double, java.lang.StringBuffer, java.text.FieldPosition). This may result in loss of magnitude information and precision for BigInteger and BigDecimal values.

Parameters
number	Object: the number to format
toAppendTo	StringBuffer: the StringBuffer to which the formatted text is to be appended
pos	FieldPosition: keeps track on the position of the field within the returned string. For example, for formatting a number 1234567.89 in Locale.US locale, if the given fieldPosition is NumberFormat.INTEGER_FIELD, the begin index and end index of fieldPosition will be set to 0 and 9, respectively for the output string 1,234,567.89.

Returns
StringBuffer	the value passed in as toAppendTo

Throws
IllegalArgumentException	if number is null or not an instance of Number.
NullPointerException	if toAppendTo or pos is null
ArithmeticException	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See also:

• FieldPosition

format

Added in API level 1

public final String format (double number)

Specialization of format.

Parameters
number	double: the double number to format

Returns
String	the formatted String

Throws
ArithmeticException	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See also:

• Format.format(Object)

format

Added in API level 1

public abstract StringBuffer format (double number, 
                StringBuffer toAppendTo, 
                FieldPosition pos)

Specialization of format.

Parameters
number	double: the double number to format
toAppendTo	StringBuffer: the StringBuffer to which the formatted text is to be appended
pos	FieldPosition: keeps track on the position of the field within the returned string. For example, for formatting a number 1234567.89 in Locale.US locale, if the given fieldPosition is NumberFormat.INTEGER_FIELD, the begin index and end index of fieldPosition will be set to 0 and 9, respectively for the output string 1,234,567.89.

Returns
StringBuffer	the formatted StringBuffer

Throws
ArithmeticException	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See also:

• Format.format(Object)

format

Added in API level 1

public final String format (long number)

Specialization of format.

Parameters
number	long: the long number to format

Returns
String	the formatted String

Throws
ArithmeticException	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See also:

• Format.format(Object)

format

Added in API level 1

public abstract StringBuffer format (long number, 
                StringBuffer toAppendTo, 
                FieldPosition pos)

Specialization of format.

Parameters
number	long: the long number to format
toAppendTo	StringBuffer: the StringBuffer to which the formatted text is to be appended
pos	FieldPosition: keeps track on the position of the field within the returned string. For example, for formatting a number 123456789 in Locale.US locale, if the given fieldPosition is NumberFormat.INTEGER_FIELD, the begin index and end index of fieldPosition will be set to 0 and 11, respectively for the output string 123,456,789.

Returns
StringBuffer	the formatted StringBuffer

Throws
ArithmeticException	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See also:

• Format.format(Object)

getAvailableLocales

Added in API level 1

public static Locale[] getAvailableLocales ()

Returns a scientific format for the current default locale. /*public* static final NumberFormat getScientificInstance() { return getInstance(Locale.getDefault(Locale.Category.FORMAT), null, SCIENTIFICSTYLE); } /** Returns a scientific format for the specified locale.

Returns
Locale[]

getCurrency

Added in API level 1

public Currency getCurrency ()

Gets the currency used by this number format when formatting currency values. The initial value is derived in a locale dependent way. The returned value may be null if no valid currency could be determined and no currency has been set using setCurrency.

The default implementation throws UnsupportedOperationException.

Returns
Currency	the currency used by this number format, or null

Throws
UnsupportedOperationException	if the number format class doesn't implement currency formatting

getCurrencyInstance

Added in API level 1

public static NumberFormat getCurrencyInstance (Locale inLocale)

Returns a currency format for the specified locale.

If the specified locale contains the "cf" ( currency format style) Unicode extension, the returned currency format uses the style if it is available. Otherwise, the style uses the default "standard" currency format. For example, if the style designates "account", negative currency amounts use a pair of parentheses in some locales.

Parameters
inLocale	Locale: the desired locale

Returns
NumberFormat	the NumberFormat instance for currency formatting

getCurrencyInstance

Added in API level 1

public static final NumberFormat getCurrencyInstance ()

Returns a currency format for the current default FORMAT locale.

This is equivalent to calling getCurrencyInstance(Locale.getDefault(Locale.Category.FORMAT)).

Returns
NumberFormat	the NumberFormat instance for currency formatting

See also:

• Locale.getDefault(java.util.Locale.Category)
• Locale.Category.FORMAT

getInstance

Added in API level 1

public static final NumberFormat getInstance ()

Returns a general-purpose number format for the current default FORMAT locale. This is the same as calling getNumberInstance().

Returns
NumberFormat	the NumberFormat instance for general-purpose number formatting

getInstance

Added in API level 1

public static NumberFormat getInstance (Locale inLocale)

Returns a general-purpose number format for the specified locale. This is the same as calling getNumberInstance(inLocale).

Parameters
inLocale	Locale: the desired locale

Returns
NumberFormat	the NumberFormat instance for general-purpose number formatting

getIntegerInstance

Added in API level 1

public static final NumberFormat getIntegerInstance ()

Returns an integer number format for the current default FORMAT locale. The returned number format is configured to round floating point numbers to the nearest integer using half-even rounding (see RoundingMode.HALF_EVEN) for formatting, and to parse only the integer part of an input string (see isParseIntegerOnly).

This is equivalent to calling getIntegerInstance(Locale.getDefault(Locale.Category.FORMAT)).

Returns
NumberFormat	a number format for integer values

See also:

• getRoundingMode()
• Locale.getDefault(java.util.Locale.Category)
• Locale.Category.FORMAT

getIntegerInstance

Added in API level 1

public static NumberFormat getIntegerInstance (Locale inLocale)

Returns an integer number format for the specified locale. The returned number format is configured to round floating point numbers to the nearest integer using half-even rounding (see RoundingMode.HALF_EVEN) for formatting, and to parse only the integer part of an input string (see isParseIntegerOnly).

Parameters
inLocale	Locale: the desired locale

Returns
NumberFormat	a number format for integer values

See also:

• getRoundingMode()

getMaximumFractionDigits

Added in API level 1

public int getMaximumFractionDigits ()

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

Returns
int	the maximum number of digits.

See also:

• setMaximumFractionDigits(int)

getMaximumIntegerDigits

Added in API level 1

public int getMaximumIntegerDigits ()

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

Returns
int	the maximum number of digits

See also:

• setMaximumIntegerDigits(int)

getMinimumFractionDigits

Added in API level 1

public int getMinimumFractionDigits ()

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

Returns
int	the minimum number of digits

See also:

• setMinimumFractionDigits(int)

getMinimumIntegerDigits

Added in API level 1

public int getMinimumIntegerDigits ()

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

Returns
int	the minimum number of digits

See also:

• setMinimumIntegerDigits(int)

getNumberInstance

Added in API level 1

public static final NumberFormat getNumberInstance ()

Returns a general-purpose number format for the current default FORMAT locale.

This is equivalent to calling getNumberInstance(Locale.getDefault(Locale.Category.FORMAT)).

Returns
NumberFormat	the NumberFormat instance for general-purpose number formatting

See also:

• Locale.getDefault(java.util.Locale.Category)
• Locale.Category.FORMAT

getNumberInstance

Added in API level 1

public static NumberFormat getNumberInstance (Locale inLocale)

Returns a general-purpose number format for the specified locale.

Parameters
inLocale	Locale: the desired locale

Returns
NumberFormat	the NumberFormat instance for general-purpose number formatting

getPercentInstance

Added in API level 1

public static NumberFormat getPercentInstance (Locale inLocale)

Returns a percentage format for the specified locale.

Parameters
inLocale	Locale: the desired locale

Returns
NumberFormat	the NumberFormat instance for percentage formatting

getPercentInstance

Added in API level 1

public static final NumberFormat getPercentInstance ()

Returns a percentage format for the current default FORMAT locale.

This is equivalent to calling getPercentInstance(Locale.getDefault(Locale.Category.FORMAT)).

Returns
NumberFormat	the NumberFormat instance for percentage formatting

See also:

• Locale.getDefault(java.util.Locale.Category)
• Locale.Category.FORMAT

getRoundingMode

Added in API level 9

public RoundingMode getRoundingMode ()

Gets the RoundingMode used in this NumberFormat. The default implementation of this method in NumberFormat always throws UnsupportedOperationException. Subclasses which handle different rounding modes should override this method.

Returns
RoundingMode	The RoundingMode used for this NumberFormat.

Throws
UnsupportedOperationException	The default implementation always throws this exception

See also:

• setRoundingMode(RoundingMode)

hashCode

Added in API level 1

public int hashCode ()

Overrides hashCode.

Returns
int	a hash code value for this object.

isGroupingUsed

Added in API level 1

public boolean isGroupingUsed ()

Returns true if grouping is used in this format. For example, in the English locale, with grouping on, the number 1234567 might be formatted as "1,234,567". The grouping separator as well as the size of each group is locale dependent and is determined by sub-classes of NumberFormat.

Returns
boolean	true if grouping is used; false otherwise

See also:

• setGroupingUsed(boolean)

isParseIntegerOnly

Added in API level 1

public boolean isParseIntegerOnly ()

Returns true if this format will parse numbers as integers only. For example in the English locale, with ParseIntegerOnly true, the string "1234." would be parsed as the integer value 1234 and parsing would stop at the "." character. Of course, the exact format accepted by the parse operation is locale dependent and determined by sub-classes of NumberFormat.

Returns
boolean	true if numbers should be parsed as integers only; false otherwise

parse

Added in API level 1

public Number parse (String source)

Parses text from the beginning of the given string to produce a number. The method may not use the entire text of the given string.

See the parse(java.lang.String, java.text.ParsePosition) method for more information on number parsing.

WARNING: Don't use this method to deserialize a number. The underlying localized number format and parsing behaviors can change across Android versions as common usage in the locale changes. Consider using the parse methods in the boxed types, e.g. Long.parseLong(String), or BigDecimal for deserializing a locale-independent decimal number.

Parameters
source	String: A String whose beginning should be parsed.

Returns
Number	A Number parsed from the string.

Throws
ParseException	if the beginning of the specified string cannot be parsed.

parse

Added in API level 1

public abstract Number parse (String source, 
                ParsePosition parsePosition)

Returns a Long if possible (e.g., within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals), otherwise a Double. If IntegerOnly is set, will stop at a decimal point (or equivalent; e.g., for rational numbers "1 2/3", will stop after the 1). Does not throw an exception; if no object can be parsed, index is unchanged!

WARNING: Don't use this method to deserialize a number. The underlying localized number format and parsing behaviors can change across Android versions as common usage in the locale changes. Consider using the parse methods in the boxed types, e.g. Long.parseLong(String), or BigDecimal for deserializing a locale-independent decimal number.

Parameters
source	String: the String to parse
parsePosition	ParsePosition: the parse position

Returns
Number	the parsed value

See also:

• isParseIntegerOnly()
• Format.parseObject(String)

parseObject

Added in API level 1

public final Object parseObject (String source, 
                ParsePosition pos)

Parses text from a string to produce a Number.

The method attempts to parse text starting at the index given by pos. If parsing succeeds, then the index of pos is 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 updated pos can be used to indicate the starting point for the next call to this method. If an error occurs, then the index of pos is not changed, the error index of pos is set to the index of the character where the error occurred, and null is returned.

See the parse(java.lang.String, java.text.ParsePosition) method for more information on number parsing.

Parameters
source	String: A String, part of which should be parsed.
pos	ParsePosition: A ParsePosition object with index and error index information as described above.

Returns
Object	A Number parsed from the string. In case of error, returns null.

Throws
NullPointerException	if source or pos is null.

setCurrency

Added in API level 1

public void setCurrency (Currency currency)

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 default implementation throws UnsupportedOperationException.

Parameters
currency	Currency: the new currency to be used by this number format

Throws
UnsupportedOperationException	if the number format class doesn't implement currency formatting
NullPointerException	if currency is null

setGroupingUsed

Added in API level 1

public void setGroupingUsed (boolean newValue)

Set whether or not grouping will be used in this format.

Parameters
newValue	boolean: true if grouping is used; false otherwise

See also:

• isGroupingUsed()

setMaximumFractionDigits

Added in API level 1

public void setMaximumFractionDigits (int newValue)

Sets the maximum number of digits allowed in the fraction portion of a number. maximumFractionDigits must be ≥ minimumFractionDigits. If the new value for maximumFractionDigits is less than the current value of minimumFractionDigits, then minimumFractionDigits will also be set to the new value.

Parameters
newValue	int: 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:

• getMaximumFractionDigits()

setMaximumIntegerDigits

Added in API level 1

public void setMaximumIntegerDigits (int newValue)

Sets the maximum number of digits allowed in the integer portion of a number. maximumIntegerDigits must be ≥ minimumIntegerDigits. If the new value for maximumIntegerDigits is less than the current value of minimumIntegerDigits, then minimumIntegerDigits will also be set to the new value.

Parameters
newValue	int: 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:

• getMaximumIntegerDigits()

setMinimumFractionDigits

Added in API level 1

public void setMinimumFractionDigits (int newValue)

Sets the minimum number of digits allowed in the fraction portion of a number. minimumFractionDigits must be ≤ maximumFractionDigits. If the new value for minimumFractionDigits exceeds the current value of maximumFractionDigits, then maximumFractionDigits will also be set to the new value

Parameters
newValue	int: 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:

• getMinimumFractionDigits()

setMinimumIntegerDigits

Added in API level 1

public void setMinimumIntegerDigits (int newValue)

Sets the minimum number of digits allowed in the integer portion of a number. minimumIntegerDigits must be ≤ maximumIntegerDigits. If the new value for minimumIntegerDigits exceeds the current value of maximumIntegerDigits, then maximumIntegerDigits will also be set to the new value

Parameters
newValue	int: 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:

• getMinimumIntegerDigits()

setParseIntegerOnly

Added in API level 1

public void setParseIntegerOnly (boolean value)

Sets whether or not numbers should be parsed as integers only.

Parameters
value	boolean: true if numbers should be parsed as integers only; false otherwise

See also:

• isParseIntegerOnly()

setRoundingMode

Added in API level 9

public void setRoundingMode (RoundingMode roundingMode)

Sets the RoundingMode used in this NumberFormat. The default implementation of this method in NumberFormat always throws UnsupportedOperationException. Subclasses which handle different rounding modes should override this method.

Parameters
roundingMode	RoundingMode: The RoundingMode to be used

Throws
UnsupportedOperationException	The default implementation always throws this exception
NullPointerException	if roundingMode is null

See also:

• getRoundingMode()