Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Nested Classes](https://developer.android.com/reference/java/text/NumberFormat#nestedclasses) \| [Constants](https://developer.android.com/reference/java/text/NumberFormat#constants) \| [Protected Ctors](https://developer.android.com/reference/java/text/NumberFormat#proctors) \| [Methods](https://developer.android.com/reference/java/text/NumberFormat#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/text/NumberFormat#inhmethods)

# NumberFormat


`
public


abstract
class
NumberFormat
`


`


`

`

extends https://developer.android.com/reference/java/text/Format


`

`


`

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [java.text.Format](https://developer.android.com/reference/java/text/Format) ||
|   | ↳ | java.text.NumberFormat |

|---|
| Known direct subclasses [ChoiceFormat](https://developer.android.com/reference/java/text/ChoiceFormat), [DecimalFormat](https://developer.android.com/reference/java/text/DecimalFormat) |---|---| | [ChoiceFormat](https://developer.android.com/reference/java/text/ChoiceFormat) | A `ChoiceFormat` allows you to attach a format to a range of numbers. | | [DecimalFormat](https://developer.android.com/reference/java/text/DecimalFormat) | `DecimalFormat` is a concrete subclass of `NumberFormat` that formats decimal numbers. | |

<br />

*** ** * ** ***

`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](https://developer.android.com/reference/java/util/Locale.html#def_locale_extension),
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 `https://developer.android.com/reference/java/util/Locale#US`. 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:**

- `https://developer.android.com/reference/java/text/DecimalFormat`
- `https://developer.android.com/reference/java/text/ChoiceFormat`

## Summary

| ### Nested classes ||
|---|---|
| ` class` | `https://developer.android.com/reference/java/text/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` | `https://developer.android.com/reference/java/text/NumberFormat#FRACTION_FIELD` Field constant used to construct a FieldPosition object. |
| `int` | `https://developer.android.com/reference/java/text/NumberFormat#INTEGER_FIELD` Field constant used to construct a FieldPosition object. |

| ### Protected constructors ||
|---|---|
| ` https://developer.android.com/reference/java/text/NumberFormat#NumberFormat()() ` Sole constructor. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/text/NumberFormat#clone()() ` Overrides Cloneable. |
| ` boolean` | ` https://developer.android.com/reference/java/text/NumberFormat#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Overrides equals. |
| ` https://developer.android.com/reference/java/lang/StringBuffer` | ` https://developer.android.com/reference/java/text/NumberFormat#format(java.lang.Object,%20java.lang.StringBuffer,%20java.text.FieldPosition)(https://developer.android.com/reference/java/lang/Object number, https://developer.android.com/reference/java/lang/StringBuffer toAppendTo, https://developer.android.com/reference/java/text/FieldPosition pos) ` Formats a number and appends the resulting text to the given string buffer. |
| ` final https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/text/NumberFormat#format(double)(double number) ` Specialization of format. |
| ` abstract https://developer.android.com/reference/java/lang/StringBuffer` | ` https://developer.android.com/reference/java/text/NumberFormat#format(double,%20java.lang.StringBuffer,%20java.text.FieldPosition)(double number, https://developer.android.com/reference/java/lang/StringBuffer toAppendTo, https://developer.android.com/reference/java/text/FieldPosition pos) ` Specialization of format. |
| ` final https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/text/NumberFormat#format(long)(long number) ` Specialization of format. |
| ` abstract https://developer.android.com/reference/java/lang/StringBuffer` | ` https://developer.android.com/reference/java/text/NumberFormat#format(long,%20java.lang.StringBuffer,%20java.text.FieldPosition)(long number, https://developer.android.com/reference/java/lang/StringBuffer toAppendTo, https://developer.android.com/reference/java/text/FieldPosition pos) ` Specialization of format. |
| ` static https://developer.android.com/reference/java/util/Locale` | ` https://developer.android.com/reference/java/text/NumberFormat#getAvailableLocales()() ` Returns a scientific format for the current default locale. |
| ` https://developer.android.com/reference/java/util/Currency` | ` https://developer.android.com/reference/java/text/NumberFormat#getCurrency()() ` Gets the currency used by this number format when formatting currency values. |
| ` static https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getCurrencyInstance(java.util.Locale)(https://developer.android.com/reference/java/util/Locale inLocale) ` Returns a currency format for the specified locale. |
| ` static final https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getCurrencyInstance()() ` Returns a currency format for the current default `https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. |
| ` static final https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getInstance()() ` Returns a general-purpose number format for the current default `https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. |
| ` static https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getInstance(java.util.Locale)(https://developer.android.com/reference/java/util/Locale inLocale) ` Returns a general-purpose number format for the specified locale. |
| ` static final https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getIntegerInstance()() ` Returns an integer number format for the current default `https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. |
| ` static https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getIntegerInstance(java.util.Locale)(https://developer.android.com/reference/java/util/Locale inLocale) ` Returns an integer number format for the specified locale. |
| ` int` | ` https://developer.android.com/reference/java/text/NumberFormat#getMaximumFractionDigits()() ` Returns the maximum number of digits allowed in the fraction portion of a number. |
| ` int` | ` https://developer.android.com/reference/java/text/NumberFormat#getMaximumIntegerDigits()() ` Returns the maximum number of digits allowed in the integer portion of a number. |
| ` int` | ` https://developer.android.com/reference/java/text/NumberFormat#getMinimumFractionDigits()() ` Returns the minimum number of digits allowed in the fraction portion of a number. |
| ` int` | ` https://developer.android.com/reference/java/text/NumberFormat#getMinimumIntegerDigits()() ` Returns the minimum number of digits allowed in the integer portion of a number. |
| ` static final https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getNumberInstance()() ` Returns a general-purpose number format for the current default `https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. |
| ` static https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getNumberInstance(java.util.Locale)(https://developer.android.com/reference/java/util/Locale inLocale) ` Returns a general-purpose number format for the specified locale. |
| ` static https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getPercentInstance(java.util.Locale)(https://developer.android.com/reference/java/util/Locale inLocale) ` Returns a percentage format for the specified locale. |
| ` static final https://developer.android.com/reference/java/text/NumberFormat` | ` https://developer.android.com/reference/java/text/NumberFormat#getPercentInstance()() ` Returns a percentage format for the current default `https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. |
| ` https://developer.android.com/reference/java/math/RoundingMode` | ` https://developer.android.com/reference/java/text/NumberFormat#getRoundingMode()() ` Gets the `https://developer.android.com/reference/java/math/RoundingMode` used in this NumberFormat. |
| ` int` | ` https://developer.android.com/reference/java/text/NumberFormat#hashCode()() ` Overrides hashCode. |
| ` boolean` | ` https://developer.android.com/reference/java/text/NumberFormat#isGroupingUsed()() ` Returns true if grouping is used in this format. |
| ` boolean` | ` https://developer.android.com/reference/java/text/NumberFormat#isParseIntegerOnly()() ` Returns true if this format will parse numbers as integers only. |
| ` https://developer.android.com/reference/java/lang/Number` | ` https://developer.android.com/reference/java/text/NumberFormat#parse(java.lang.String)(https://developer.android.com/reference/java/lang/String source) ` Parses text from the beginning of the given string to produce a number. |
| ` abstract https://developer.android.com/reference/java/lang/Number` | ` https://developer.android.com/reference/java/text/NumberFormat#parse(java.lang.String,%20java.text.ParsePosition)(https://developer.android.com/reference/java/lang/String source, https://developer.android.com/reference/java/text/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 https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/text/NumberFormat#parseObject(java.lang.String,%20java.text.ParsePosition)(https://developer.android.com/reference/java/lang/String source, https://developer.android.com/reference/java/text/ParsePosition pos) ` Parses text from a string to produce a `Number`. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setCurrency(java.util.Currency)(https://developer.android.com/reference/java/util/Currency currency) ` Sets the currency used by this number format when formatting currency values. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setGroupingUsed(boolean)(boolean newValue) ` Set whether or not grouping will be used in this format. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setMaximumFractionDigits(int)(int newValue) ` Sets the maximum number of digits allowed in the fraction portion of a number. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setMaximumIntegerDigits(int)(int newValue) ` Sets the maximum number of digits allowed in the integer portion of a number. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setMinimumFractionDigits(int)(int newValue) ` Sets the minimum number of digits allowed in the fraction portion of a number. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setMinimumIntegerDigits(int)(int newValue) ` Sets the minimum number of digits allowed in the integer portion of a number. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setParseIntegerOnly(boolean)(boolean value) ` Sets whether or not numbers should be parsed as integers only. |
| ` void` | ` https://developer.android.com/reference/java/text/NumberFormat#setRoundingMode(java.math.RoundingMode)(https://developer.android.com/reference/java/math/RoundingMode roundingMode) ` Sets the `https://developer.android.com/reference/java/math/RoundingMode` used in this NumberFormat. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/text/Format ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/text/Format#clone()() ` Creates and returns a copy of this object. | | ` final https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/text/Format#format(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Formats an object to produce a string. | | ` abstract https://developer.android.com/reference/java/lang/StringBuffer` | ` https://developer.android.com/reference/java/text/Format#format(java.lang.Object,%20java.lang.StringBuffer,%20java.text.FieldPosition)(https://developer.android.com/reference/java/lang/Object obj, https://developer.android.com/reference/java/lang/StringBuffer toAppendTo, https://developer.android.com/reference/java/text/FieldPosition pos) ` Formats an object and appends the resulting text to a given string buffer. | | ` https://developer.android.com/reference/java/text/AttributedCharacterIterator` | ` https://developer.android.com/reference/java/text/Format#formatToCharacterIterator(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Formats an Object producing an `AttributedCharacterIterator`. | | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/text/Format#parseObject(java.lang.String)(https://developer.android.com/reference/java/lang/String source) ` Parses text from the beginning of the given string to produce an object. | | ` abstract https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/text/Format#parseObject(java.lang.String,%20java.text.ParsePosition)(https://developer.android.com/reference/java/lang/String source, https://developer.android.com/reference/java/text/ParsePosition pos) ` Parses text from a string to produce an object. | ||
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` | ` https://developer.android.com/reference/java/lang/Object#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](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

**See also:**

- `https://developer.android.com/reference/java/text/FieldPosition`

Constant Value:

1
(0x00000001)


### INTEGER_FIELD

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

**See also:**

- `https://developer.android.com/reference/java/text/FieldPosition`

Constant Value:

0
(0x00000000)


## Protected constructors

### NumberFormat

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
protected NumberFormat ()
```

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

<br />

## Public methods

### clone

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Object clone ()
```

Overrides Cloneable.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/Object` | a clone of this instance. <br /> |

### equals

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean equals (Object obj)
```

Overrides equals.

<br />

| Parameters ||
|---|---|
| `obj` | `Object`: the reference object with which to compare. <br /> |

| Returns ||
|---|---|
| `boolean` | `true` if this object is the same as the obj argument; `false` otherwise. <br /> |

### format

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/java/lang/Number`.


This implementation extracts the number's value using
`https://developer.android.com/reference/java/lang/Number#longValue()` for all integral type values that
can be converted to `long` without loss of information,
including `BigInteger` values with a
`https://developer.android.com/reference/java/math/BigInteger#bitLength()` of less than 64,
and `https://developer.android.com/reference/java/lang/Number#doubleValue()` for all other types. It
then calls
`https://developer.android.com/reference/java/text/NumberFormat#format(long,%20java.lang.StringBuffer,%20java.text.FieldPosition)`
or `https://developer.android.com/reference/java/text/NumberFormat#format(double,%20java.lang.StringBuffer,%20java.text.FieldPosition)`.
This may result in loss of magnitude information and precision for
`BigInteger` and `BigDecimal` values.

<br />

| Parameters ||
|---|---|
| `number` | `Object`: the number to format <br /> |
| `toAppendTo` | `StringBuffer`: the `StringBuffer` to which the formatted text is to be appended <br /> |
| `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 `https://developer.android.com/reference/java/text/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`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/StringBuffer` | the value passed in as `toAppendTo` <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY |
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if `number` is null or not an instance of `Number`. |
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `toAppendTo` or `pos` is null |

**See also:**

- `https://developer.android.com/reference/java/text/FieldPosition`

### format

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public final String format (double number)
```

Specialization of format.

<br />

| Parameters ||
|---|---|
| `number` | `double`: the double number to format <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the formatted String <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY |

**See also:**

- `https://developer.android.com/reference/java/text/Format#format(java.lang.Object)`

### format

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

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

Specialization of format.

<br />

| Parameters ||
|---|---|
| `number` | `double`: the double number to format <br /> |
| `toAppendTo` | `StringBuffer`: the StringBuffer to which the formatted text is to be appended <br /> |
| `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 `https://developer.android.com/reference/java/text/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`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/StringBuffer` | the formatted StringBuffer <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY |

**See also:**

- `https://developer.android.com/reference/java/text/Format#format(java.lang.Object)`

### format

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public final String format (long number)
```

Specialization of format.

<br />

| Parameters ||
|---|---|
| `number` | `long`: the long number to format <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the formatted String <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY |

**See also:**

- `https://developer.android.com/reference/java/text/Format#format(java.lang.Object)`

### format

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

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

Specialization of format.

<br />

| Parameters ||
|---|---|
| `number` | `long`: the long number to format <br /> |
| `toAppendTo` | `StringBuffer`: the StringBuffer to which the formatted text is to be appended <br /> |
| `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 `https://developer.android.com/reference/java/text/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`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/StringBuffer` | the formatted StringBuffer <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if rounding is needed with rounding mode being set to RoundingMode.UNNECESSARY |

**See also:**

- `https://developer.android.com/reference/java/text/Format#format(java.lang.Object)`

### getAvailableLocales

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/Locale` | <br /> |

### getCurrency

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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
`https://developer.android.com/reference/java/text/NumberFormat#setCurrency(java.util.Currency)`.


The default implementation throws
`UnsupportedOperationException`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/Currency` | the currency used by this number format, or `null` <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/UnsupportedOperationException` | if the number format class doesn't implement currency formatting |

### getCurrencyInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static NumberFormat getCurrencyInstance (Locale inLocale)
```

Returns a currency format for the specified locale.

If the specified locale contains the "`cf`" (
[currency format style](https://www.unicode.org/reports/tr35/tr35.html#UnicodeCurrencyFormatIdentifier))
[Unicode extension](https://developer.android.com/reference/java/util/Locale.html#def_locale_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.

<br />

| Parameters ||
|---|---|
| `inLocale` | `Locale`: the desired locale <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for currency formatting <br /> |

### getCurrencyInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final NumberFormat getCurrencyInstance ()
```

Returns a currency format for the current default
`https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale.

This is equivalent to calling
`https://developer.android.com/reference/java/text/NumberFormat#getCurrencyInstance(java.util.Locale)`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for currency formatting <br /> |

**See also:**

- `https://developer.android.com/reference/java/util/Locale#getDefault(java.util.Locale.Category)`
- `https://developer.android.com/reference/java/util/Locale.Category#FORMAT`

### getInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final NumberFormat getInstance ()
```

Returns a general-purpose number format for the current default
`https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale.
This is the same as calling
`https://developer.android.com/reference/java/text/NumberFormat#getNumberInstance()`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for general-purpose number formatting <br /> |

### getInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static NumberFormat getInstance (Locale inLocale)
```

Returns a general-purpose number format for the specified locale.
This is the same as calling
`https://developer.android.com/reference/java/text/NumberFormat#getNumberInstance(java.util.Locale)`.

<br />

| Parameters ||
|---|---|
| `inLocale` | `Locale`: the desired locale <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for general-purpose number formatting <br /> |

### getIntegerInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final NumberFormat getIntegerInstance ()
```

Returns an integer number format for the current default
`https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale. The
returned number format is configured to round floating point numbers
to the nearest integer using half-even rounding (see `https://developer.android.com/reference/java/math/RoundingMode#HALF_EVEN`) for formatting,
and to parse only the integer part of an input string (see `https://developer.android.com/reference/java/text/NumberFormat#isParseIntegerOnly()`).

This is equivalent to calling
`https://developer.android.com/reference/java/text/NumberFormat#getIntegerInstance(java.util.Locale)`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | a number format for integer values <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getRoundingMode()`
- `https://developer.android.com/reference/java/util/Locale#getDefault(java.util.Locale.Category)`
- `https://developer.android.com/reference/java/util/Locale.Category#FORMAT`

### getIntegerInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/java/math/RoundingMode#HALF_EVEN`) for formatting,
and to parse only the integer part of an input string (see `https://developer.android.com/reference/java/text/NumberFormat#isParseIntegerOnly()`).

<br />

| Parameters ||
|---|---|
| `inLocale` | `Locale`: the desired locale <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | a number format for integer values <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getRoundingMode()`

### getMaximumFractionDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMaximumFractionDigits ()
```

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

<br />

| Returns ||
|---|---|
| `int` | the maximum number of digits. <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setMaximumFractionDigits(int)`

### getMaximumIntegerDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMaximumIntegerDigits ()
```

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

<br />

| Returns ||
|---|---|
| `int` | the maximum number of digits <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setMaximumIntegerDigits(int)`

### getMinimumFractionDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMinimumFractionDigits ()
```

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

<br />

| Returns ||
|---|---|
| `int` | the minimum number of digits <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setMinimumFractionDigits(int)`

### getMinimumIntegerDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMinimumIntegerDigits ()
```

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

<br />

| Returns ||
|---|---|
| `int` | the minimum number of digits <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setMinimumIntegerDigits(int)`

### getNumberInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final NumberFormat getNumberInstance ()
```

Returns a general-purpose number format for the current default
`https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale.

This is equivalent to calling
`https://developer.android.com/reference/java/text/NumberFormat#getNumberInstance(java.util.Locale)`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for general-purpose number formatting <br /> |

**See also:**

- `https://developer.android.com/reference/java/util/Locale#getDefault(java.util.Locale.Category)`
- `https://developer.android.com/reference/java/util/Locale.Category#FORMAT`

### getNumberInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static NumberFormat getNumberInstance (Locale inLocale)
```

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

<br />

| Parameters ||
|---|---|
| `inLocale` | `Locale`: the desired locale <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for general-purpose number formatting <br /> |

### getPercentInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static NumberFormat getPercentInstance (Locale inLocale)
```

Returns a percentage format for the specified locale.

<br />

| Parameters ||
|---|---|
| `inLocale` | `Locale`: the desired locale <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for percentage formatting <br /> |

### getPercentInstance

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final NumberFormat getPercentInstance ()
```

Returns a percentage format for the current default
`https://developer.android.com/reference/java/util/Locale.Category#FORMAT` locale.

This is equivalent to calling
`https://developer.android.com/reference/java/text/NumberFormat#getPercentInstance(java.util.Locale)`.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/text/NumberFormat` | the `NumberFormat` instance for percentage formatting <br /> |

**See also:**

- `https://developer.android.com/reference/java/util/Locale#getDefault(java.util.Locale.Category)`
- `https://developer.android.com/reference/java/util/Locale.Category#FORMAT`

### getRoundingMode

Added in [API level 9](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public RoundingMode getRoundingMode ()
```

Gets the `https://developer.android.com/reference/java/math/RoundingMode` used in this NumberFormat.
The default implementation of this method in NumberFormat
always throws `https://developer.android.com/reference/java/lang/UnsupportedOperationException`.
Subclasses which handle different rounding modes should override
this method.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/math/RoundingMode` | The `RoundingMode` used for this NumberFormat. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/UnsupportedOperationException` | The default implementation always throws this exception |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setRoundingMode(java.math.RoundingMode)`

### hashCode

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int hashCode ()
```

Overrides hashCode.

<br />

| Returns ||
|---|---|
| `int` | a hash code value for this object. <br /> |

### isGroupingUsed

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Returns ||
|---|---|
| `boolean` | `true` if grouping is used; `false` otherwise <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#setGroupingUsed(boolean)`

### isParseIntegerOnly

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Returns ||
|---|---|
| `boolean` | `true` if numbers should be parsed as integers only; `false` otherwise <br /> |

### parse

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/java/text/NumberFormat#parse(java.lang.String,%20java.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. `https://developer.android.com/reference/java/lang/Long#parseLong(java.lang.String)`, or `https://developer.android.com/reference/java/math/BigDecimal` for deserializing
a locale-independent decimal number.

<br />

<br />

| Parameters ||
|---|---|
| `source` | `String`: A `String` whose beginning should be parsed. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/Number` | A `Number` parsed from the string. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/text/ParseException` | if the beginning of the specified string cannot be parsed. |

### parse

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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. `https://developer.android.com/reference/java/lang/Long#parseLong(java.lang.String)`, or `https://developer.android.com/reference/java/math/BigDecimal` for deserializing
a locale-independent decimal number.

<br />

<br />

| Parameters ||
|---|---|
| `source` | `String`: the String to parse <br /> |
| `parsePosition` | `ParsePosition`: the parse position <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/Number` | the parsed value <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#isParseIntegerOnly()`
- `https://developer.android.com/reference/java/text/Format#parseObject(java.lang.String)`

### parseObject

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/java/text/NumberFormat#parse(java.lang.String,%20java.text.ParsePosition)` method for more information
on number parsing.

<br />

| Parameters ||
|---|---|
| `source` | `String`: A `String`, part of which should be parsed. <br /> |
| `pos` | `ParsePosition`: A `ParsePosition` object with index and error index information as described above. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/Object` | A `Number` parsed from the string. In case of error, returns null. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `source` or `pos` is null. |

### setCurrency

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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`.

<br />

| Parameters ||
|---|---|
| `currency` | `Currency`: the new currency to be used by this number format <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `currency` is null |
| `https://developer.android.com/reference/java/lang/UnsupportedOperationException` | if the number format class doesn't implement currency formatting |

### setGroupingUsed

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void setGroupingUsed (boolean newValue)
```

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

<br />

| Parameters ||
|---|---|
| `newValue` | `boolean`: `true` if grouping is used; `false` otherwise <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#isGroupingUsed()`

### setMaximumFractionDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| 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. <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getMaximumFractionDigits()`

### setMaximumIntegerDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| 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. <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getMaximumIntegerDigits()`

### setMinimumFractionDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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

<br />

| 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. <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getMinimumFractionDigits()`

### setMinimumIntegerDigits

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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

<br />

| 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. <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getMinimumIntegerDigits()`

### setParseIntegerOnly

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void setParseIntegerOnly (boolean value)
```

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

<br />

| Parameters ||
|---|---|
| `value` | `boolean`: `true` if numbers should be parsed as integers only; `false` otherwise <br /> |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#isParseIntegerOnly()`

### setRoundingMode

Added in [API level 9](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void setRoundingMode (RoundingMode roundingMode)
```

Sets the `https://developer.android.com/reference/java/math/RoundingMode` used in this NumberFormat.
The default implementation of this method in NumberFormat always
throws `https://developer.android.com/reference/java/lang/UnsupportedOperationException`.
Subclasses which handle different rounding modes should override
this method.

<br />

| Parameters ||
|---|---|
| `roundingMode` | `RoundingMode`: The `RoundingMode` to be used <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `roundingMode` is null |
| `https://developer.android.com/reference/java/lang/UnsupportedOperationException` | The default implementation always throws this exception |

**See also:**

- `https://developer.android.com/reference/java/text/NumberFormat#getRoundingMode()`