How to display a number with always 2 decimal points using BigDecimal?

Question

I am using BigDecimal to get some price values. Requirement is something like this, what ever the value we fetch from database, the displayed valued should have 2 decimal points.

Eg:

fetched value is 1 - should be displayed as 1.00
fetched value is 1.7823 - should be displayed as 1.78

I am using setScale(2, BigDecimal.ROUND_HALF_UP) but still some places, if the data from DB is a whole number then the same is being displayed !!

I mean if the value is 0 from DB its displayed as 0 only. I want that to be displayed as 0.00

Thanks

I think you can find your answer right here: http://stackoverflow.com/a/50543/61624 — Daniel Kaplan, Jan 25 '13 at 05:02
thanks daniel :)that was too fast reply.. but i am already using the bigdecimal.round_half_up with setscale(2) it works when u have number like 2.12 or 4.2343. when the value is a whole number like just 2 then i want that to be displayed as 2.00 and this is where i am failing !! — user1391730, Jan 25 '13 at 05:05
possible duplicate of [How do I format a number in java?](http://stackoverflow.com/questions/50532/how-do-i-format-a-number-in-java) — Bhavesh Patadiya, Jan 25 '13 at 06:09

score 58 · Answer 1 · answered Jan 25 '13 at 05:11

58

BigDecimal is immutable, any operation on it including setScale(2, BigDecimal.ROUND_HALF_UP) produces a new BigDecimal. Correct code should be

        BigDecimal bd = new BigDecimal(1);
//      bd.setScale(2, BigDecimal.ROUND_HALF_UP);   bd.setScale does not change bd
        bd = bd.setScale(2, BigDecimal.ROUND_HALF_UP);
        System.out.println(bd);

output

1.00

answered Jan 25 '13 at 05:11

Evgeniy Dorofeev

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This is deprecated since Java 9, use `.setScale(2, RoundingMode.HALF_UP);` – Xdg Jun 12 '18 at 14:07

score 14 · Answer 2 · edited Mar 19 '18 at 07:40

14

you can use the round up format

BigDecimal bd = new BigDecimal(2.22222);
System.out.println(bd.setScale(2,BigDecimal.ROUND_UP));

Hope this help you.

edited Mar 19 '18 at 07:40

Mr.vicky patel

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answered Jan 25 '13 at 05:20

corgrin

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score 7 · Answer 3 · answered Jan 25 '13 at 05:25

7

To format numbers in JAVA you can use:

 System.out.printf("%1$.2f", d);

where d is your variable or number

or

 DecimalFormat f = new DecimalFormat("##.00");  // this will helps you to always keeps in two decimal places
 System.out.println(f.format(d));

answered Jan 25 '13 at 05:25

Ariston Alcantara

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Better to use ```new DecimalFormat("##0.00");```, because with ```##.00``` for ```0``` you will get ```.00``` instead of ```0.00``` – Alexander Stepchkov Aug 22 '19 at 11:50

score 2 · Answer 4 · answered Jan 25 '13 at 05:05

2

You need to use something like NumberFormat with appropriate locale to format

NumberFormat.getCurrencyInstance().format(bigDecimal);

answered Jan 25 '13 at 05:05

kosa

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This will print the currency symbol, e.g. $, along with the number, which the OP did not mention he wanted. But like the thought of using the currency instance here for readability. – pierus Dec 15 '15 at 15:36

score 2 · Answer 5 · answered Oct 21 '13 at 04:05

2

BigDecimal.setScale would work.

answered Oct 21 '13 at 04:05

engineer

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score 0 · Answer 6 · answered Jan 27 '20 at 12:22

The below code may help.

protected String getLocalizedBigDecimalValue(BigDecimal input, Locale locale) {
    final NumberFormat numberFormat = NumberFormat.getNumberInstance(locale);
    numberFormat.setGroupingUsed(true);
    numberFormat.setMaximumFractionDigits(2);
    numberFormat.setMinimumFractionDigits(2);
    return numberFormat.format(input);
}

How to display a number with always 2 decimal points using BigDecimal?

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