Java.util.Currency Class

Last update on August 19 2022 21:51:24 (UTC/GMT +8 hours)

Currency Class

Represents a currency. Currencies are identified by their ISO 4217 currency codes. Visit the ISO web site for more information.

The class is designed so that there's never more than one Currency instance for any given currency. Therefore, there's no public constructor. You obtain a Currency instance using the getInstance methods.

Users can supersede the Java runtime currency data by means of the system property java.util.currency.data. If this system property is defined then its value is the location of a properties file, the contents of which are key/value pairs of the ISO 3166 country codes and the ISO 4217 currency data respectively. The value part consists of three ISO 4217 values of a currency, i.e., an alphabetic code, a numeric code, and a minor unit. Those three ISO 4217 values are separated by commas. The lines which start with '#'s are considered comment lines. An optional UTC timestamp may be specified per currency entry if users need to specify a cutover date indicating when the new data comes into effect. The timestamp is appended to the end of the currency properties and uses a comma as a separator. If a UTC datestamp is present and valid, the JRE will only use the new currency properties if the current UTC date is later than the date specified at class loading time. The format of the timestamp must be of ISO 8601 format : 'yyyy-MM-dd'T'HH:mm:ss'. For example,

#Sample currency properties
JP=JPZ,999,0

will supersede the currency data for Japan.

#Sample currency properties with cutover date

JP=JPZ,999,0,2014-01-01T00:00:00

will supersede the currency data for Japan if Currency class is loaded after 1st January 2014 00:00:00 GMT.

Where syntactically malformed entries are encountered, the entry is ignored and the remainder of entries in file are processed. For instances where duplicate country code entries exist, the behavior of the Currency information for that Currency is undefined and the remainder of entries in file are processed.

Method Summary:

Name	Type	Description
getAvailableCurrencies()	Set	Gets the set of available currencies.
getCurrencyCode	String	Gets the ISO 4217 currency code of this currencys.
getDefaultFractionDigits	int	Gets the default number of fraction digits used with this currency.
getDisplayName()	String	Gets the name that is suitable for displaying this currency for the default DISPLAY locale.
getInstance()	static Currency	Returns the Currency instance for the country of the given locale.
getNumericCode()	int	Returns the ISO 4217 numeric code of this currency.
getSymbol()	String	Gets the symbol of this currency for the default DISPLAY locale.
toString()	String	Returns the ISO 4217 currency code of this currency.

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