Rounding double value for currency

Question

Having a lot of trouble rounding a value to display in a textView.

I basically wanna round it to two decimal places but at the moment I am getting a long trail of different numbers.

I am playing around with BigDecimal but no luck so far...

public void calc() {
        BigDecimal bd = new BigDecimal(subTotal);
        bd.setScale(2, BigDecimal.ROUND_DOWN);
        total.setText(String.valueOf(bd));
    }

Don't use floating-point values to represent currency! See http://stackoverflow.com/questions/3730019/why-not-use-double-or-float-to-represent-currency — Graham Borland, Dec 12 '12 at 00:04

score 1 · Answer 1 · edited Dec 11 '12 at 23:03

1

Try the following code:

double roundTwoDecimals(double d) {
    DecimalFormat twoDForm = new DecimalFormat("#.##");
    return Double.valueOf(twoDForm.format(d));
}

edited Dec 11 '12 at 23:03

Squonk

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answered Dec 11 '12 at 23:00

Pavlos

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That sort of worked but when I kept adding I eventually got the trailing zeros again..any idea ? – Javacadabra Dec 11 '12 at 23:04
Maybe you should always format it before displaying it!! – Pavlos Dec 11 '12 at 23:10

Terel · Answer 2 · 2012-12-11T23:43:49.643

0

Following worked for me

BigDecimal bd = new BigDecimal(subTotal);
bd = bd.setScale(2, BigDecimal.ROUND_HALF_UP);
total.setText(String.valueOf(bd));
// Input: 9.888888 -> Output: 9.89
// Input: 9f -> Output: 9.00

edited Dec 11 '12 at 23:43

answered Dec 11 '12 at 23:20

Terel

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Rounding double value for currency

2 Answers2