Class NumberFormat.NumberFormatFactory

  • Direct Known Subclasses:
    NumberFormat.SimpleNumberFormatFactory
    Enclosing class:
    NumberFormat

    public abstract static class NumberFormat.NumberFormatFactory
    extends Object
    A NumberFormatFactory is used to register new number formats. The factory should be able to create any of the predefined formats for each locale it supports. When registered, the locales it supports extend or override the locales already supported by ICU.

    Note: as of ICU4J 3.2, the default API for NumberFormatFactory uses ULocale instead of Locale. Instead of overriding createFormat(Locale, int), new implementations should override createFactory(ULocale, int). Note that one of these two methods MUST be overridden or else an infinite loop will occur.

    • Field Detail

      • FORMAT_NUMBER

        public static final int FORMAT_NUMBER
        Value passed to format requesting a default number format.
        See Also:
        Constant Field Values
      • FORMAT_CURRENCY

        public static final int FORMAT_CURRENCY
        Value passed to format requesting a currency format.
        See Also:
        Constant Field Values
      • FORMAT_PERCENT

        public static final int FORMAT_PERCENT
        Value passed to format requesting a percent format.
        See Also:
        Constant Field Values
      • FORMAT_SCIENTIFIC

        public static final int FORMAT_SCIENTIFIC
        Value passed to format requesting a scientific format.
        See Also:
        Constant Field Values
      • FORMAT_INTEGER

        public static final int FORMAT_INTEGER
        Value passed to format requesting an integer format.
        See Also:
        Constant Field Values
    • Constructor Detail

      • NumberFormatFactory

        protected NumberFormatFactory()
    • Method Detail

      • visible

        public boolean visible()
        Returns true if this factory is visible. Default is true. If not visible, the locales supported by this factory will not be listed by getAvailableLocales. This value must not change.
        Returns:
        true if the factory is visible.
      • getSupportedLocaleNames

        public abstract Set<String> getSupportedLocaleNames()
        Returns an immutable collection of the locale names directly supported by this factory.
        Returns:
        the supported locale names.
      • createFormat

        public NumberFormat createFormat​(ULocale loc,
                                         int formatType)
        Returns a number format of the appropriate type. If the locale is not supported, return null. If the locale is supported, but the type is not provided by this service, return null. Otherwise return an appropriate instance of NumberFormat. Note: as of ICU4J 3.2, implementations should override this method instead of createFormat(Locale, int).
        Parameters:
        loc - the locale for which to create the format
        formatType - the type of format
        Returns:
        the NumberFormat, or null.
      • createFormat

        public NumberFormat createFormat​(Locale loc,
                                         int formatType)
        Returns a number format of the appropriate type. If the locale is not supported, return null. If the locale is supported, but the type is not provided by this service, return null. Otherwise return an appropriate instance of NumberFormat. Note: as of ICU4J 3.2, createFormat(ULocale, int) should be overridden instead of this method. This method is no longer abstract and delegates to that method.
        Parameters:
        loc - the locale for which to create the format
        formatType - the type of format
        Returns:
        the NumberFormat, or null.