DecimalFormat rounding

Question

Here is small code to illustrate what I am seeing

float floater = 59.999f;

DecimalFormat df = new DecimalFormat(\"00.0\");

System.out.println(df.format(flo         


        

Answer 1

Add this line before using the DecimalFormat:

df.setRoundingMode(RoundingMode.DOWN);

Take a look at the other rounding modes and see which one is best for you.

Note : this method works only in JDK 1.6 or above

Answer 2

float d = 59.999f;
BigDecimal bd = new BigDecimal(d);
// Use the returned value from setScale, as it doesn't modify the caller.
bd = bd.setScale(1, BigDecimal.ROUND_FLOOR);
String formatted = bd.toString();