jetbrick-commons/src/main/java/jetbrick/lang/LocaleUtils.java
public static NumberFormat getNumberFormat(Locale locale) {
        LocaleInfo info = lookupLocaleInfo(locale);
        NumberFormat nf = info.numberFormat;
        if (nf == null) {
            nf = NumberFormat.getInstance(locale);
            info.numberFormat = nf;
        }
        return nf;
    }
public static NumberFormat getNumberFormat(Locale locale) {
        LocaleInfo info = lookupLocaleInfo(locale);
        NumberFormat nf = info.numberFormat;
        if (nf == null) {
            nf = NumberFormat.getInstance(locale);
            info.numberFormat = nf;
        }
        return nf;
    }
Returns cached <code>NumberFormat</code> instance for specified locale.