Java.text.DecimalFormat

Question

hi folks,
I'm trying to format a floating point number so that it has exactly two digits after the decimal
DecimalFormat df=new DecimalFormat("##.00");
System.err.println(df.format(12.995));
My desired output is 12.99(truncation, no rounding)
the actual output is 13.00 (rounding)
how do I acheive what I what?
thank you!!

Answer 1

Since DecimalFormat uses ROUND_HALF_EVEN, you need to use something else. The java.math.BigDecimal class is something you could use:
double value = 12.995;
BigDecimal bd = new BigDecimal(value);
bd = bd.setScale(2, BigDecimal.ROUND_DOWN);
System.err.println(bd); This would print out 12.99.