Antal decimaler

import java.text.DecimalFormat;

public class TwoDecimals {
  public static void main(String[] args) {
      double d1 = 123.456;
      double d2 = 123456;
      double d3 = 0.123456;
      DecimalFormat fmt1 = new DecimalFormat("0.00");
      DecimalFormat fmt2 = new DecimalFormat("#.00");
      System.out.println(fmt1.format(d1) + " " + fmt2.format(d1));
      System.out.println(fmt1.format(d2) + " " + fmt2.format(d2));
      System.out.println(fmt1.format(d3) + " " + fmt2.format(d3));
  }
}

Tak det ser fint ud, men hvorfor vælger den at bruge , som decimal seperator istedet for .?

Du kan angive locale:

  private final static NumberFormat df2 = new DecimalFormat("###,##0.00000", new DecimalFormatSymbols(new Locale("da", "DK")));

  private final static NumberFormat df2 = new DecimalFormat("###,##0.00000", new DecimalFormatSymbols(new Locale("en", "US")));

Tak. Lægger du lige et svar?

kommer her