Java/Development Class/Big Decimal

Decimal Format Demo

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import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;
public class DecimalFormatDemo {
  static public void customFormat(String pattern, double value) {
    DecimalFormat myFormatter = new DecimalFormat(pattern);
    String output = myFormatter.format(value);
    System.out.println(value + "  " + pattern + "  " + output);
  }
  static public void localizedFormat(String pattern, double value, Locale loc) {
    NumberFormat nf = NumberFormat.getNumberInstance(loc);
    DecimalFormat df = (DecimalFormat) nf;
    df.applyPattern(pattern);
    String output = df.format(value);
    System.out.println(pattern + "  " + output + "  " + loc.toString());
  }
  static public void main(String[] args) {
    customFormat("###,###.###", 123456.789);
    customFormat("###.##", 123456.789);
    customFormat("000000.000", 123.78);
    customFormat("$###,###.###", 12345.67);
    customFormat("\u00a5###,###.###", 12345.67);
    Locale currentLocale = new Locale("en", "US");
    DecimalFormatSymbols unusualSymbols = new DecimalFormatSymbols(
        currentLocale);
    unusualSymbols.setDecimalSeparator("|");
    unusualSymbols.setGroupingSeparator("^");
    String strange = "#,##0.###";
    DecimalFormat weirdFormatter = new DecimalFormat(strange,
        unusualSymbols);
    weirdFormatter.setGroupingSize(4);
    String bizarre = weirdFormatter.format(12345.678);
    System.out.println(bizarre);
    Locale[] locales = { new Locale("en", "US"), new Locale("de", "DE"),
        new Locale("fr", "FR") };
    for (int i = 0; i < locales.length; i++) {
      localizedFormat("###,###.###", 123456.789, locales[i]);
    }
  }
}