i want to round off a double value to its nearest 0.05 in java. eg: 54.625 to 54.65
or
32.1885 to 32.19 etc.
Asked
Active
Viewed 5,606 times
1
-
possible duplicate of [round decimal to nearest 10th](http://stackoverflow.com/questions/1887826/round-decimal-to-nearest-10th) – Paul Tomblin Oct 14 '10 at 20:39
-
http://stackoverflow.com/questions/2235814/rounding-a-decimal-to-the-nearest-0-05 – Paul Tomblin Oct 14 '10 at 20:39
-
http://stackoverflow.com/questions/2857497/roundoff-double-values-in-java – Paul Tomblin Oct 14 '10 at 20:40
-
http://stackoverflow.com/questions/153724/how-to-round-a-number-to-n-decimal-places-in-java – Paul Tomblin Oct 14 '10 at 20:42
1 Answers
1
double foo = 54.625;
foo = (int)(foo * 20.0 + 0.5) / 20.0;
This is quick and dirty - it doesn't handle negative numbers correctly, for instance. But for simple problems, it's a simple solution.
Paul Tomblin
- 179,021
- 58
- 319
- 408
-
this rounds to the nearest 0.01 and it can get a rounding erro in the division. – Peter Lawrey Oct 14 '10 at 20:42
-
paul the above solution works. but it gives the output as 16.490000000000002 instead of 16.49. how do i truncate it?? – meenakshi Oct 14 '10 at 21:26
-
1Shilpa, that is how floating point numbers work. If you want exact output, use BigDecimal. – Thorbjørn Ravn Andersen Oct 14 '10 at 21:33
-
-
-
@Davide I bet if you timed it, you'd find my solution works 100x faster than converting to text and back. – Paul Tomblin Dec 22 '16 at 19:49
-