Added in API level 1

NumberFormat

abstract class NumberFormat : Format

kotlin.Any
↳	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	is a concrete subclass of `NumberFormat` that formats decimal numbers.

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:

<code>myString = NumberFormat.getInstance().format(myNumber);
  </code>

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.

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

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

<code>NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH);
  </code>

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:

<code>myNumber = nf.parse(myString);
  </code>

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:

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.
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.

Summary

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

Constants
static Int	`FRACTION_FIELD` Field constant used to construct a FieldPosition object.
static Int	`INTEGER_FIELD` Field constant used to construct a FieldPosition object.

Protected constructors
`NumberFormat()` Sole constructor.

Public methods
open Any	`clone()` Overrides Cloneable.
open Boolean	`equals(other: Any?)` Overrides equals.
String	`format(number: Double)` Specialization of format.
abstract StringBuffer	`format(number: Double, toAppendTo: StringBuffer, pos: FieldPosition)` Specialization of format.
open StringBuffer	`format(number: Any, toAppendTo: StringBuffer, pos: FieldPosition)` Formats a number and appends the resulting text to the given string buffer.
String	`format(number: Long)` Specialization of format.
abstract StringBuffer	`format(number: Long, toAppendTo: StringBuffer, pos: FieldPosition)` Specialization of format.
open static Array<Locale!>	`getAvailableLocales()` Returns a scientific format for the current default locale.
open Currency?	`getCurrency()` Gets the currency used by this number format when formatting currency values.
static NumberFormat	`getCurrencyInstance()` Returns a currency format for the current default `FORMAT` locale.
open static NumberFormat	`getCurrencyInstance(inLocale: Locale)` Returns a currency format for the specified locale.
static NumberFormat	`getInstance()` Returns a general-purpose number format for the current default `FORMAT` locale.
open static NumberFormat	`getInstance(inLocale: Locale)` Returns a general-purpose number format for the specified locale.
static NumberFormat	`getIntegerInstance()` Returns an integer number format for the current default `FORMAT` locale.
open static NumberFormat	`getIntegerInstance(inLocale: Locale)` Returns an integer number format for the specified locale.
open Int	`getMaximumFractionDigits()` Returns the maximum number of digits allowed in the fraction portion of a number.
open Int	`getMaximumIntegerDigits()` Returns the maximum number of digits allowed in the integer portion of a number.
open Int	`getMinimumFractionDigits()` Returns the minimum number of digits allowed in the fraction portion of a number.
open Int	`getMinimumIntegerDigits()` Returns the minimum number of digits allowed in the integer portion of a number.
static NumberFormat	`getNumberInstance()` Returns a general-purpose number format for the current default `FORMAT` locale.
open static NumberFormat	`getNumberInstance(inLocale: Locale)` Returns a general-purpose number format for the specified locale.
static NumberFormat	`getPercentInstance()` Returns a percentage format for the current default `FORMAT` locale.
open static NumberFormat	`getPercentInstance(inLocale: Locale)` Returns a percentage format for the specified locale.
open RoundingMode	`getRoundingMode()` Gets the `java.math.RoundingMode` used in this NumberFormat.
open Int	`hashCode()` Overrides hashCode.
open Boolean	`isGroupingUsed()` Returns true if grouping is used in this format.
open Boolean	`isParseIntegerOnly()` Returns true if this format will parse numbers as integers only.
open Number?	`parse(source: String)` Parses text from the beginning of the given string to produce a number.
abstract Number?	`parse(source: String, 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.
Any?	`parseObject(source: String, pos: ParsePosition)` Parses text from a string to produce a `Number`.
open Unit	`setCurrency(currency: Currency)` Sets the currency used by this number format when formatting currency values.
open Unit	`setGroupingUsed(newValue: Boolean)` Set whether or not grouping will be used in this format.
open Unit	`setMaximumFractionDigits(newValue: Int)` Sets the maximum number of digits allowed in the fraction portion of a number.
open Unit	`setMaximumIntegerDigits(newValue: Int)` Sets the maximum number of digits allowed in the integer portion of a number.
open Unit	`setMinimumFractionDigits(newValue: Int)` Sets the minimum number of digits allowed in the fraction portion of a number.
open Unit	`setMinimumIntegerDigits(newValue: Int)` Sets the minimum number of digits allowed in the integer portion of a number.
open Unit	`setParseIntegerOnly(value: Boolean)` Sets whether or not numbers should be parsed as integers only.
open Unit	`setRoundingMode(roundingMode: RoundingMode?)` Sets the `java.math.RoundingMode` used in this NumberFormat.

Inherited functions

From class Format

String!

format(obj: Any!)

Formats an object to produce a string. This is equivalent to format(obj, new StringBuffer(), new FieldPosition(0)).toString();

AttributedCharacterIterator!

formatToCharacterIterator(obj: Any!)

Formats an Object producing an AttributedCharacterIterator. You can use the returned AttributedCharacterIterator to build the resulting String, as well as to determine information about the resulting String.

Each attribute key of the AttributedCharacterIterator will be of type Field. It is up to each Format implementation to define what the legal values are for each attribute in the AttributedCharacterIterator, but typically the attribute key is also used as the attribute value.

The default implementation creates an AttributedCharacterIterator with no attributes. Subclasses that support fields should override this and create an AttributedCharacterIterator with meaningful attributes.

Any!

parseObject(source: String!)

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

Constants

FRACTION_FIELD

Added in API level 1

static val FRACTION_FIELD: Int

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

Value: 1

See Also

java.text.FieldPosition

INTEGER_FIELD

Added in API level 1

static val INTEGER_FIELD: Int

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

Value: 0

See Also

java.text.FieldPosition

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

open fun clone(): Any

Overrides Cloneable.

Return
`Any`	a clone of this instance.

Exceptions
`java.lang.CloneNotSupportedException`	if the object's class does not support the `Cloneable` interface. Subclasses that override the `clone` method can also throw this exception to indicate that an instance cannot be cloned.

equals

Added in API level 1

open fun equals(other: Any?): Boolean

Overrides equals.

Parameters
`obj`	the reference object with which to compare.

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

format

Added in API level 1

fun format(number: Double): String

Specialization of format.

Parameters
`number`	Double: the double number to format

Return
`String`	the formatted String

Exceptions
`java.lang.ArithmeticException`	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See Also

format

Added in API level 1

abstract fun format(
    number: Double, 
    toAppendTo: StringBuffer, 
    pos: FieldPosition
): StringBuffer

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`.

Return
`StringBuffer`	the formatted StringBuffer

Exceptions
`java.lang.ArithmeticException`	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See Also

format

Added in API level 1

open fun format(
    number: Any, 
    toAppendTo: StringBuffer, 
    pos: FieldPosition
): StringBuffer

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

This implementation extracts the number's value using java.lang.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 java.lang.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
`obj`	The object 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`.
`number`	Any: the number to format

Return
`StringBuffer`	the value passed in as `toAppendTo`

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

See Also

java.text.FieldPosition

format

Added in API level 1

fun format(number: Long): String

Specialization of format.

Parameters
`number`	Long: the long number to format

Return
`String`	the formatted String

Exceptions
`java.lang.ArithmeticException`	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See Also

format

Added in API level 1

abstract fun format(
    number: Long, 
    toAppendTo: StringBuffer, 
    pos: FieldPosition
): StringBuffer

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`.

Return
`StringBuffer`	the formatted StringBuffer

Exceptions
`java.lang.ArithmeticException`	if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY

See Also

getAvailableLocales

Added in API level 1

open static fun getAvailableLocales(): Array<Locale!>

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.

Parameters
`inLocale`	the desired locale /public static NumberFormat getScientificInstance(Locale inLocale) { return getInstance(inLocale, null, SCIENTIFICSTYLE); }

getCurrency

Added in API level 1

open fun getCurrency(): Currency?

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.

Return
`Currency?`	the currency used by this number format, or `null`

Exceptions
`java.lang.UnsupportedOperationException`	if the number format class doesn't implement currency formatting

getCurrencyInstance

Added in API level 1

static fun getCurrencyInstance(): NumberFormat

Returns a currency format for the current default FORMAT locale.

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

Return
`NumberFormat`	the `NumberFormat` instance for currency formatting

See Also

getCurrencyInstance

Added in API level 1

open static fun getCurrencyInstance(inLocale: Locale): NumberFormat

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

Return
`NumberFormat`	the `NumberFormat` instance for currency formatting

getInstance

Added in API level 1

static fun getInstance(): NumberFormat

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

Return
`NumberFormat`	the `NumberFormat` instance for general-purpose number formatting

getInstance

Added in API level 1

open static fun getInstance(inLocale: Locale): NumberFormat

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

Parameters
`inLocale`	Locale: the desired locale

Return
`NumberFormat`	the `NumberFormat` instance for general-purpose number formatting

getIntegerInstance

Added in API level 1

static fun getIntegerInstance(): NumberFormat

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)).

Return
`NumberFormat`	a number format for integer values

See Also

getIntegerInstance

Added in API level 1

open static fun getIntegerInstance(inLocale: Locale): NumberFormat

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

Return
`NumberFormat`	a number format for integer values

See Also

#getRoundingMode()

getMaximumFractionDigits

Added in API level 1

open fun getMaximumFractionDigits(): Int

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

Return
`Int`	the maximum number of digits.

See Also

#setMaximumFractionDigits

getMaximumIntegerDigits

Added in API level 1

open fun getMaximumIntegerDigits(): Int

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

Return
`Int`	the maximum number of digits

See Also

#setMaximumIntegerDigits

getMinimumFractionDigits

Added in API level 1

open fun getMinimumFractionDigits(): Int

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

Return
`Int`	the minimum number of digits

See Also

#setMinimumFractionDigits

getMinimumIntegerDigits

Added in API level 1

open fun getMinimumIntegerDigits(): Int

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

Return
`Int`	the minimum number of digits

See Also

#setMinimumIntegerDigits

getNumberInstance

Added in API level 1

static fun getNumberInstance(): NumberFormat

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

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

Return
`NumberFormat`	the `NumberFormat` instance for general-purpose number formatting

See Also

getNumberInstance

Added in API level 1

open static fun getNumberInstance(inLocale: Locale): NumberFormat

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

Parameters
`inLocale`	Locale: the desired locale

Return
`NumberFormat`	the `NumberFormat` instance for general-purpose number formatting

getPercentInstance

Added in API level 1

static fun getPercentInstance(): NumberFormat

Returns a percentage format for the current default FORMAT locale.

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

Return
`NumberFormat`	the `NumberFormat` instance for percentage formatting

See Also

getPercentInstance

Added in API level 1

open static fun getPercentInstance(inLocale: Locale): NumberFormat

Returns a percentage format for the specified locale.

Parameters
`inLocale`	Locale: the desired locale

Return
`NumberFormat`	the `NumberFormat` instance for percentage formatting

getRoundingMode

Added in API level 9

open fun getRoundingMode(): RoundingMode

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

Return
`RoundingMode`	The `RoundingMode` used for this NumberFormat.

Exceptions
`java.lang.UnsupportedOperationException`	The default implementation always throws this exception

See Also

#setRoundingMode(RoundingMode)

hashCode

Added in API level 1

open fun hashCode(): Int

Overrides hashCode.

Return
`Int`	a hash code value for this object.

isGroupingUsed

Added in API level 1

open fun isGroupingUsed(): Boolean

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.

Return
`Boolean`	`true` if grouping is used; `false` otherwise

See Also

#setGroupingUsed

isParseIntegerOnly

Added in API level 1

open fun isParseIntegerOnly(): Boolean

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.

Return
`Boolean`	`true` if numbers should be parsed as integers only; `false` otherwise

parse

Added in API level 1

open fun parse(source: String): Number?

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 java.math.BigDecimal for deserializing a locale-independent decimal number.

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

Return
`Number?`	A `Number` parsed from the string.

Exceptions
`java.text.ParseException`	if the beginning of the specified string cannot be parsed.

parse

Added in API level 1

abstract fun parse(
    source: String, 
    parsePosition: ParsePosition
): Number?

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!

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

Return
`Number?`	the parsed value

See Also

java.text.NumberFormat#isParseIntegerOnly

parseObject

Added in API level 1

fun parseObject(
    source: String, 
    pos: ParsePosition
): Any?

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.

Return
`Any?`	A `Number` parsed from the string. In case of error, returns null.

Exceptions
`java.lang.NullPointerException`	if `source` or `pos` is null.

setCurrency

Added in API level 1

open fun setCurrency(currency: Currency): Unit

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

Exceptions
`java.lang.UnsupportedOperationException`	if the number format class doesn't implement currency formatting
`java.lang.NullPointerException`	if `currency` is null

setGroupingUsed

Added in API level 1

open fun setGroupingUsed(newValue: Boolean): Unit

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

open fun setMaximumFractionDigits(newValue: Int): Unit

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

open fun setMaximumIntegerDigits(newValue: Int): Unit

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

open fun setMinimumFractionDigits(newValue: Int): Unit

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

open fun setMinimumIntegerDigits(newValue: Int): Unit

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

open fun setParseIntegerOnly(value: Boolean): Unit

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

open fun setRoundingMode(roundingMode: RoundingMode?): Unit

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

Parameters
`roundingMode`	RoundingMode?: The `RoundingMode` to be used

Exceptions
`java.lang.UnsupportedOperationException`	The default implementation always throws this exception
`java.lang.NullPointerException`	if `roundingMode` is null

See Also

#getRoundingMode()