Why my answer does not appear with 2 decimals?

Question

I can't understand where's the problem and why my number does not become with 2 numbers in the end. Tried various examples, but still receiving an problem.

public double apskaiciuotiKainaUzLitra(int kaina, int talpa) {
        double kainaLitro = (1000 / talpa) * kaina;
        double roundOff = Math.round(kainaLitro * 100.0) / 100.0;
        return roundOff;
    }

'Still receiving an problem' I mean that my number is still with 1 number in the end. — HenrikasB, Jan 21 '19 at 10:12
Can you add the current output of your code and your desired output? — mrbolichi, Jan 21 '19 at 10:12
Did you use integer division here intentionally? 1000 / talpa? https://stackoverflow.com/q/4685450/1288408 — Modus Tollens, Jan 21 '19 at 10:14
Related: https://stackoverflow.com/questions/153724/how-to-round-a-number-to-n-decimal-places-in-java — Hulk, Jan 21 '19 at 10:16

Sudhir Ojha · Accepted Answer · 2019-01-21T10:20:59.670

1

Use String.format() to format

public double apskaiciuotiKainaUzLitra(int kaina, int talpa) {
        double kainaLitro = (1000 / talpa) * kaina;
        double roundOff = Math.round(kainaLitro * 100.0) / 100.0;
        return new Double(String.format( "%.2f", roundOff));
}

edited Jan 21 '19 at 10:20

answered Jan 21 '19 at 10:13

Sudhir Ojha

3,009
2
11
23

It worked! Thank you! – HenrikasB Jan 21 '19 at 10:14
3

Doesn't this code have a mismatch between the declared return type and the actual returned type? – mrbolichi Jan 21 '19 at 10:16
It should not work. The method returns double whereas this code is returning a String. – Parth Manaktala Jan 21 '19 at 10:19
@mrbolichi edited. – Sudhir Ojha Jan 21 '19 at 10:21
@Parth updated the answer. – Sudhir Ojha Jan 21 '19 at 10:23

score 0 · Answer 2 · answered Jan 21 '19 at 10:11

0

NumberFormat formatter = new DecimalFormat("#0.00");

After doing that, you can use formatter.

answered Jan 21 '19 at 10:11

Onur Arı

502
3
16

Why my answer does not appear with 2 decimals?

2 Answers2