Java Reference
In-Depth Information
der "un menu fantastique." A message that took adjectives and
nouns from lists and displayed them in such a phrase could use a
MessageFormat object to localize the order.
NumberFormat is an abstract class that defines a general way to
format and parse various kinds of numbers for different locales.
It has two subclasses: ChoiceFormat to choose among alternatives
based on number (such as picking between a singular or plural
variant of a word); and DecimalFormat to format and parse decimal
numbers. (The formatting capabilities of NumberFormat are more
powerful than those provided by java.util.Formatter .)
NumberFormat in turn has four different kinds of "get instance" methods.
Each method uses either a provided Locale object or the default locale.
getNumberInstance returns a general number formatter/parser.
This is the kind of object returned by the generic getInstance
method.
getIntegerInstance returns a number formatter/parser that rounds
floating-point values to the nearest integer.
getCurrencyInstance returns a formatter/parser for currency val-
ues. The Currency object used by a NumberFormatter can also be re-
trieved with the getCurrency method.
getPercentInstance returns a formatter/parser for percentages.
Here is a method you can use to print a number using the format for
several different locales:
public void reformat(double num, String[] locales) {
for (String loc : locales) {
Locale pl = parseLocale(loc);
NumberFormat fmt = NumberFormat.getInstance(pl);
System.out.print(fmt.format(num));
System.out.println("\t" + pl.getDisplayName());
}
 
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