Added in API level 30

FractionPrecision

public abstract class FractionPrecision
extends Precision

java.lang.Object
   ↳ android.icu.number.Precision
     ↳ android.icu.number.FractionPrecision


A class that defines a rounding strategy based on a number of fraction places and optionally significant digits to be used when formatting numbers in NumberFormatter.

To create a FractionPrecision, use one of the factory methods on Precision.

See also:

Summary

Public methods

Precision withMaxDigits(int maxSignificantDigits)

Ensure that no more than this number of significant digits are retained when rounding according to fraction rules.

Precision withMinDigits(int minSignificantDigits)

Ensure that no less than this number of significant digits are retained when rounding according to fraction rules.

Precision withSignificantDigits(int minSignificantDigits, int maxSignificantDigits, NumberFormatter.RoundingPriority priority)

Override maximum fraction digits with maximum significant digits depending on the magnitude of the number.

Inherited methods

Public methods

withMaxDigits

Added in API level 30
public Precision withMaxDigits (int maxSignificantDigits)

Ensure that no more than this number of significant digits are retained when rounding according to fraction rules.

For example, with integer rounding, the number 123.4 becomes "123". However, with maximum figures set to 2, 123.4 becomes "120" instead.

This setting does not affect the number of trailing zeros. For example, with fixed fraction of 2, 123.4 would become "120.00".

This is equivalent to `withSignificantDigits(1, maxSignificantDigits, STRICT)`.

Parameters
maxSignificantDigits int: Round the number to no more than this number of significant figures.

Returns
Precision A Precision for chaining or passing to the NumberFormatter rounding() setter.

Throws
IllegalArgumentException if the input number is too big or smaller than 1.

See also:

withMinDigits

Added in API level 30
public Precision withMinDigits (int minSignificantDigits)

Ensure that no less than this number of significant digits are retained when rounding according to fraction rules.

For example, with integer rounding, the number 3.141 becomes "3". However, with minimum figures set to 2, 3.141 becomes "3.1" instead.

This setting does not affect the number of trailing zeros. For example, 3.01 would print as "3", not "3.0".

This is equivalent to `withSignificantDigits(1, minSignificantDigits, RELAXED)`.

Parameters
minSignificantDigits int: The number of significant figures to guarantee.

Returns
Precision A Precision for chaining or passing to the NumberFormatter rounding() setter.

Throws
IllegalArgumentException if the input number is too big or smaller than 1.

See also:

withSignificantDigits

Added in API level 34
public Precision withSignificantDigits (int minSignificantDigits, 
                int maxSignificantDigits, 
                NumberFormatter.RoundingPriority priority)

Override maximum fraction digits with maximum significant digits depending on the magnitude of the number. See UNumberRoundingPriority.

Parameters
minSignificantDigits int: Pad trailing zeros to achieve this minimum number of significant digits.

maxSignificantDigits int: Round the number to achieve this maximum number of significant digits.

priority NumberFormatter.RoundingPriority: How to disambiguate between fraction digits and significant digits.

Returns
Precision A precision for chaining or passing to the NumberFormatter precision() setter.