Java: Use DecimalFormat to format doubles and integers but keep integers without a decimal separator

Question

I\'m trying to format some numbers in a Java program. The numbers will be both doubles and integers. When handling doubles, I want to keep only two decimal points but when h

Answer 1

Could you not just wrapper this into a Utility call. For example

public class MyFormatter {

  private static DecimalFormat df;
  static {
    df = new DecimalFormat("#,###,##0.00");
    DecimalFormatSymbols otherSymbols = new   DecimalFormatSymbols(Locale.ENGLISH);
    otherSymbols.setDecimalSeparator('.');
    otherSymbols.setGroupingSeparator(',');
    df.setDecimalFormatSymbols(otherSymbols);
  }

  public static  String format(T number) {
     if (Integer.isAssignableFrom(number.getClass())
       return number.toString();

     return df.format(number);
  }
}

You can then just do things like: MyFormatter.format(int) etc.