Package com.ibm.icu.text
Class NumberingSystem
java.lang.Object
com.ibm.icu.text.NumberingSystem
NumberingSystem
is the base class for all number
systems. This class provides the interface for setting different numbering
system types, whether it be a simple alternate digit system such as
Thai digits or Devanagari digits, or an algorithmic numbering system such
as Hebrew numbering or Chinese numbering.- Author:
- John Emmons
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final NumberingSystem
For convenience, an instance representing the latn numbering system, which corresponds to digits in the ASCII range '0' through '9'. -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic String[]
Returns a string array containing a list of the names of numbering systems currently known to ICU.Returns the description string of the current numbering system.static NumberingSystem
Returns the default numbering system for the defaultFORMAT
locale.static NumberingSystem
getInstance
(int radix_in, boolean isAlgorithmic_in, String desc_in) Factory method for creating a numbering system.static NumberingSystem
getInstance
(ULocale locale) Returns the default numbering system for the specified ULocale.static NumberingSystem
getInstance
(Locale inLocale) Returns the default numbering system for the specified locale.static NumberingSystem
getInstanceByName
(String name) Returns a numbering system from one of the predefined numbering systems known to ICU.getName()
Returns the string representing the name of the numbering system.int
getRadix()
Returns the radix of the current numbering system.boolean
Returns the numbering system's algorithmic status.static boolean
isValidDigitString
(String str) Convenience method to determine if a given digit string is valid for use as a descriptor of a numeric ( non-algorithmic ) numbering system.
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Field Details
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LATIN
For convenience, an instance representing the latn numbering system, which corresponds to digits in the ASCII range '0' through '9'.
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Constructor Details
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NumberingSystem
public NumberingSystem()Default constructor. Returns a numbering system that uses the Latin-script decimal digits 0 through 9. This should be equivalent to NumberingSystem.LATIN.
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Method Details
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getInstance
Factory method for creating a numbering system.- Parameters:
radix_in
- The radix for this numbering system. ICU currently supports only numbering systems whose radix is 10.isAlgorithmic_in
- Specifies whether the numbering system is algorithmic (true) or numeric (false).desc_in
- String used to describe the characteristics of the numbering system. For numeric systems, this string contains the digits used by the numbering system, in order, starting from zero. For algorithmic numbering systems, the string contains the name of the RBNF ruleset in the locale's NumberingSystemRules section that will be used to format numbers using this numbering system.
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getInstance
Returns the default numbering system for the specified locale. -
getInstance
Returns the default numbering system for the specified ULocale. -
getInstance
Returns the default numbering system for the defaultFORMAT
locale.- See Also:
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getInstanceByName
Returns a numbering system from one of the predefined numbering systems known to ICU. Numbering system names are based on the numbering systems defined in CLDR. To get a list of available numbering systems, use the getAvailableNames method.- Parameters:
name
- The name of the desired numbering system. Numbering system names often correspond with the name of the script they are associated with. For example, "thai" for Thai digits, "hebr" for Hebrew numerals.- Returns:
- The NumberingSystem instance, or null if not available.
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getAvailableNames
Returns a string array containing a list of the names of numbering systems currently known to ICU.- Returns:
- An array of strings in alphabetical (invariant) order.
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isValidDigitString
Convenience method to determine if a given digit string is valid for use as a descriptor of a numeric ( non-algorithmic ) numbering system. In order for a digit string to be valid, it must contain exactly ten Unicode code points. -
getRadix
public int getRadix()Returns the radix of the current numbering system. -
getDescription
Returns the description string of the current numbering system. The description string describes the characteristics of the numbering system. For numeric systems, this string contains the digits used by the numbering system, in order, starting from zero. For algorithmic numbering systems, the string contains the name of the RBNF ruleset in the locale's NumberingSystemRules section that will be used to format numbers using this numbering system. -
getName
Returns the string representing the name of the numbering system. -
isAlgorithmic
public boolean isAlgorithmic()Returns the numbering system's algorithmic status. If true, the numbering system is algorithmic and uses an RBNF formatter to format numerals. If false, the numbering system is numeric and uses a fixed set of digits.
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