how can i reduce the digits after the decimal point?

Question

     private void findLatLongDistance(double prelat,double prelon,double lat,double lon) {
    // TODO Auto-generated method stub
    try{
        double prelatval=prelat;
        double prelongval=prelon;
        double curlat=lat;
        double curlon=lon;
        Log.w("inside finalatlon...........................","the daya");
        if(prelatval>0.0 && prelongval>0.0 && lat>0.0 &&  lat>0.0 && gpsdataElements.Speed>0.0){
            float distance2 = getDistance(prelatval,prelongval,curlat,curlon);
            odometer_sum= (distance2/1000 );
            // for maximum value after decimal
            //df.setMaximumFractionDigits(0);

            //rounding the km digits after decimal
            Math.round(distance2);

            //for minimum distance after decimal
            df.setMinimumFractionDigits(2);
            df.format(odometer_sum);
            gpsdataElements.Distance = gpsdataElements.Distance + odometer_sum;
        }
    }catch(Exception e){
        e.printStackTrace();
    }
}

here is my code. I want distance(i.e km)value digits after decimal is two digits. Example i want km value in 1.54km not like 1.4568923km. How to get like this.I tried a lot for that but i din't got any possible solution. Any one know please help me.

Have a look at this: http://stackoverflow.com/a/6494862/2045570 — nedaRM, Sep 02 '13 at 06:07

Developer · Accepted Answer · 2013-09-02T06:18:01.850

2

In more simple ways you can do this by using this :

double roundOff = Math.round(yourValue * 100.0) / 100.0;

Otherwise you can also do this as

String.format("%.2f", d)

edited Sep 02 '13 at 06:18

answered Sep 02 '13 at 06:08

Developer

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score 1 · Answer 2 · answered Sep 02 '13 at 06:09

1

DecimalFormat formatter = new DecimalFormat(".##");
String s = formatter.format(value);

answered Sep 02 '13 at 06:09

mleczey

513
7
16

score 0 · Answer 3 · answered Sep 02 '13 at 06:07

0

use this code to format text in two digits after decimal.

double i2=i/60000;
tv.setText(new DecimalFormat("##.##").format(i2));

answered Sep 02 '13 at 06:07

Shivang Trivedi

2,182
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score 0 · Answer 4 · answered Sep 02 '13 at 06:09

0

double roundof = Math.round(a * 100.0) / 100.0;

output:roundoff(eg:12).oo

12.00

answered Sep 02 '13 at 06:09

Ansar

364
3
16

score 0 · Answer 5 · answered Sep 02 '13 at 06:11

0

Something like this :

String.format("%.2f", distance);

answered Sep 02 '13 at 06:11

Harish Godara

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score 0 · Answer 6 · answered Sep 02 '13 at 06:20

Make function like this pass the value as per you requirment and return value as per your requirment first function will take float value and after decimal it put 3 value as per argument if you want to change decimal value then you can change 3,2,4 etc... Second function will take String value and round it in 3 decimal point:

public static BigDecimal round(float d) {
    BigDecimal bd = new BigDecimal(Float.toString(d));
    bd = bd.setScale(3, BigDecimal.ROUND_HALF_UP);       
    return bd;
}
public static BigDecimal round(String d) {
   BigDecimal bd = new BigDecimal(Float.parseFloat(d));
   bd = bd.setScale(3, BigDecimal.ROUND_HALF_UP);       
   return bd;
}

how can i reduce the digits after the decimal point?

6 Answers6