How to set thousands separator in Java?
You can use format function with ",";
int no = 124750;String str = String.format("%,d", no);//str = 124,750"," includes locale-specific grouping characters.
This should work (untested, based on JavaDoc):
DecimalFormat formatter = (DecimalFormat) NumberFormat.getInstance(Locale.US);DecimalFormatSymbols symbols = formatter.getDecimalFormatSymbols();symbols.setGroupingSeparator(' ');formatter.setDecimalFormatSymbols(symbols);System.out.println(formatter.format(bd.longValue()));According to the JavaDoc, the cast in the first line should be save for most locales.
BigDecimal bd = new BigDecimal(300000);NumberFormat formatter = NumberFormat.getInstance(new Locale("en_US"));System.out.println(formatter.format(bd.longValue()));EDIT
To get custom grouping separator such as space, do this:
DecimalFormatSymbols symbols = DecimalFormatSymbols.getInstance();symbols.setGroupingSeparator(' ');DecimalFormat formatter = new DecimalFormat("###,###.##", symbols);System.out.println(formatter.format(bd.longValue()));