I've been a programmer for many years and am just learning Java. In
the code below, I think that the for loop from
j=0 to j=3 is poor code. Instead there should be an array of
"pointers" to each getInstance function and one should iterate through
that "dereferencing" each function pointer.

Pseudo code -

FunctionPointer fplist[] = { getInstance, getIntegerInstance,
getCurrencyInstance, getPercentInstance } ;

for (fp : fplist) {
 fp->(locales[i])
}

import java.text.DecimalFormat;
import java.text.NumberFormat;

import java.text.ParseException;

import java.util.Locale;

class nf {
   public static void main(String[] arg) {

    // Print out a number using the localized number, integer, currency,
    // and percent format for each locale
    Locale[] locales = NumberFormat.getAvailableLocales();
    double myNumber = -1234.56;
    NumberFormat form;
    for (int j=0; j<4; ++j) {
       System.out.println("FORMAT");
       for (int i = 0; i < locales.length; ++i) {
        if (locales[i].getCountry().length() == 0) {
           continue; // Skip language-only locales
        }
        System.out.print(locales[i].getDisplayName());
        switch (j) {
        case 0:
           form = NumberFormat.getInstance(locales[i]); break;
        case 1:
           form = NumberFormat.getIntegerInstance(locales[i]); break;
        case 2:
           form = NumberFormat.getCurrencyInstance(locales[i]); break;
        default:
           form = NumberFormat.getPercentInstance(locales[i]); break;
        }
        if (form instanceof DecimalFormat) {
           System.out.print(": " + ((DecimalFormat) form).toPattern());
        }
        System.out.print(" -> " + form.format(myNumber));
        try {
           System.out.println(" -> " + form.parse(form.format(myNumber)));
        } catch (ParseException e) {}
       }
    }
   }
}