How to round 0.0 to 0.00 in java?

Question

I have used the following function

float val=0.0;
DecimalFormat toTheFormat = new DecimalFormat("#.##");
float value=Float.valueOf(toTheFormat.format(val));

But its not suitable for all conditions like "0.0" still "0.0". Its not scale up to "0.00".

Reimeus · Accepted Answer · 2013-10-09T12:21:25.697

13

Use

DecimalFormat toTheFormat = new DecimalFormat("0.00");

to round to 2 significant digits

edited Oct 09 '13 at 12:21

answered Oct 09 '13 at 10:39

Reimeus

158,255
15
216
276

1

`floats` cant be right padded with zeros - you need to use the output from `toTheFormat.format(val)` itself rather than `value` – Reimeus Oct 09 '13 at 10:51
Output from this method is in String. What if I need it in float? – Anto Robinson Oct 09 '13 at 10:51
2

Then you won't be able to right pad the fraction part of the as its a `float` - only a `String` can work – Reimeus Oct 09 '13 at 10:56

score 4 · Answer 2 · answered Oct 09 '13 at 10:39

4

try

DecimalFormat toTheFormat = new DecimalFormat("#.00");

answered Oct 09 '13 at 10:39

sunysen

2,265
1
12
13

Output from this method is in String. What if I need it in float? – Anto Robinson Oct 09 '13 at 10:56
You can do a conversion result – sunysen Oct 09 '13 at 10:58

score 1 · Answer 3 · answered Oct 09 '13 at 11:11

Your approach is mistaken. Rounding is a numeric operation that takes a number x and returns another number y which approximates x and has the property that the decimal expansion has only so many digits. Example:

0.123 --> 0.12

But 0.0 and 0.00 are the exact same numbers, there is no point in rounding. What you (maybe) want is to format a number in a certain way on output. For this, see the other answers.

score 1 · Answer 4 · answered Oct 09 '13 at 11:37

1

If I use DecimalFormat toTheFormat = new DecimalFormat("#.00");

am getting output as .00 not 0.00

so this would be the correct code

DecimalFormat toTheFormat = new DecimalFormat("#0.00");

answered Oct 09 '13 at 11:37

Anto Robinson

463
5
12

How to round 0.0 to 0.00 in java?

4 Answers4