net.time4j.format

Enum NumberSystem

java.lang.Object

java.lang.Enum<NumberSystem>

net.time4j.format.NumberSystem

All Implemented Interfaces:

Serializable, Comparable<NumberSystem>

public enum NumberSystem
extends Enum<NumberSystem>

Defines the number system.

Since:

3.11/4.8

Author:

Meno Hochschild

Enum Constant Summary

Enum Constants

Enum Constant and Description
ARABIC Arabic numbers with digits 0-9 (default setting).
ETHIOPIC Ethiopic numerals.
ROMAN Roman numerals in range 1-3999.

Method Summary

Modifier and Type	Method and Description
boolean	contains(char digit) Does this number system contains given digit char?
int	toInteger(String numeral) Converts given text numeral to an integer in smart mode.
int	toInteger(String numeral, Leniency leniency) Converts given text numeral to an integer.
String	toNumeral(int number) Converts given integer to a text numeral.
static NumberSystem	valueOf(String name) Returns the enum constant of this type with the specified name.
static NumberSystem[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

ARABIC

public static final NumberSystem ARABIC

Arabic numbers with digits 0-9 (default setting).

ETHIOPIC

public static final NumberSystem ETHIOPIC

Ethiopic numerals.

See also A Look at Ethiopic Numerals.

ROMAN

public static final NumberSystem ROMAN

Roman numerals in range 1-3999.

If the leniency is strict then parsing of Roman numerals will only follow modern usage. The parsing is always case-insensitive. See also Roman Numerals.

Method Detail

values

public static NumberSystem[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (NumberSystem c : NumberSystem.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static NumberSystem valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

toNumeral

public String toNumeral(int number)

Converts given integer to a text numeral.

Parameters:

number - number to be displayed as text

Returns:

text numeral

Throws:

IllegalArgumentException - if the conversion is not supported for given number

Since:

3.11/4.8

toInteger

public final int toInteger(String numeral)

Converts given text numeral to an integer in smart mode.

Parameters:

numeral - text numeral to be evaluated as number

Returns:

integer

Throws:

NumberFormatException - if given number has wrong format

ArithmeticException - if int-range overflows

Since:

3.11/4.8

toInteger

public int toInteger(String numeral,
                     Leniency leniency)

Converts given text numeral to an integer.

In most cases, the leniency will not be taken into account, but parsing of some odd roman numerals can be enabled in non-strict mode (for example: IIXX instead of XVIII).

Parameters:

numeral - text numeral to be evaluated as number

leniency - determines how lenient the parsing of given numeral should be

Returns:

integer

Throws:

NumberFormatException - if given number has wrong format

ArithmeticException - if int-range overflows

Since:

3.15/4.12

contains

public boolean contains(char digit)

Does this number system contains given digit char?

Parameters:

digit - numerical char to be checked

Returns:

boolean

Since:

3.11/4.8