Java Utililty Methods Number Format Pattern

List of utility methods to do Number Format Pattern

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Description

The list of methods to do Number Format Pattern are organized into topic(s).

Method

NumberFormatgetNumberFormatInstanceFor2DecimalDigits()
get Number Format Instance For Decimal Digits 
NumberFormat numberFormatFor2DecimalDigits = NumberFormat.getInstance();
numberFormatFor2DecimalDigits.setMaximumFractionDigits(2);
return numberFormatFor2DecimalDigits;
NumberFormatgetNumberFormatter()
get Number Formatter 
if (numberFormatter == null) {
    DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols();
    otherSymbols.setDecimalSeparator('.');
    numberFormatter = new DecimalFormat("0.0#######", otherSymbols);
return numberFormatter;
DecimalFormatgetNumberFormatter(final String format)
get Number Formatter 
ThreadLocal<DecimalFormat> threadLocal = decimalFormatters.get(format);
if (threadLocal == null) {
    threadLocal = new ThreadLocal<DecimalFormat>() {
        @Override
        protected DecimalFormat initialValue() {
            return new DecimalFormat(format);
    };
...
NumberFormatgetNumberFraction2Format(final Locale locale)
get Number Fraction Format 
final NumberFormat format = NumberFormat.getNumberInstance(locale);
format.setMaximumFractionDigits(2);
format.setMinimumFractionDigits(2);
return format;
intgetNumberOfDays(String year, String month)
get Number Of Days 
GregorianCalendar calendar = null;
SimpleDateFormat sdf = null;
try {
    int yyyy = Integer.parseInt(year);
    int mm = Integer.parseInt(month);
    calendar = new GregorianCalendar(yyyy, mm, 0);
    sdf = new SimpleDateFormat("dd");
    return Integer.parseInt(sdf.format(calendar.getTime()));
...
intgetNumberStyleAsInt(String style)
Checks a string to see if it matches one of the standard NumberFormat style patterns: number, currency, percent, integer, or default. 
if (style == null || style.length() < 6 || style.length() > 8) {
    return -1;
if (style.equalsIgnoreCase("default")) {
    return STYLE_NUMBER;
if (style.equalsIgnoreCase("number")) {
    return STYLE_NUMBER;
...
NumberFormatgetOneFractionDigitNumberFormat()
get One Fraction Digit Number Format 
NumberFormat result = NumberFormat.getInstance();
result.setMaximumFractionDigits(1);
return result;
DecimalFormatgetPriceFormat()
get Price Format 
return PRICE_FORMAT;
DecimalFormatgetScientificFormatter(int precision)
get Scientific Formatter 
DecimalFormat df = scientificFormatters.get(precision);
if (df == null) {
    StringBuffer format = new StringBuffer("0.");
    for (int i = 0; i < precision; i++)
        format.append("#");
    format.append("E0");
    df = new DecimalFormat(format.toString());
    scientificFormatters.put(precision, df);
...
chargetSeparator(final NumberFormat format)
Returns the separator to use between numbers. 
if (format instanceof DecimalFormat) {
    final char c = ((DecimalFormat) format).getDecimalFormatSymbols().getDecimalSeparator();
    if (c == ',') {
        return ';';
return ',';