android big decimal approximation

Question

I want to approximate a number showing only two digits after the decimal point. I wrote this:

String result = String.valueOf(new BigDecimal(price).setScale(4, BigDecimal.ROUND_UP).doubleValue());

If price is a decimal number like 63,9222, it works fine. But If price is ,for example, equal to 7.00, is printed 7.0 .

I tried to use RoundingMode.CEILING instead of BigDecimal.ROUND_UP , but it didn't work and i don't know why. Maybe it will be better to use Double instead of BigDecimal?

Use NumberFormat to avoid all that hassle: http://stackoverflow.com/questions/3395825/how-to-print-formatted-bigdecimal-values — Charlie Collins, Jun 12 '13 at 12:44

score 2 · Accepted Answer · answered Jun 12 '13 at 12:35

2

Use String.format

double myValue = new BigDecimal(price).setScale(4, BigDecimal.ROUND_UP).doubleValue());
String result = String.format(Locale.ENGLISH, "%.2f", myValue);

answered Jun 12 '13 at 12:35

Blackbelt

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android big decimal approximation

1 Answers1