Question

Is there a pretty print API for a mathematical String somewhere?

For example:

“10000000 – 234564”

Becomes

“10,000,000 minus 234,564”

I can make my own but can someone give me some pointers on how to do the “,” part?

Answer 1

You can do it with DecimalFormat:

NumberFormat f = NumberFormat.getInstance(loc);
if (f instanceof DecimalFormat) {
  DecimalFormat df = (DecimalFormat) f;
  df.setGroupingUsed(true);
  df.setGroupingSize(3);
  System.out.println(df.format(myNumber));
}