[SOLVED] Rounding off numbers

[Manfizy]

Hi pple,
How can i make 1879.1106288532678 to appear as 1.879E3??
Your response will be highly appreciated

[Steve11235]

Use the BigDecimal class and use its setScale() method. You can even choose from umpteem rounding methods.

[Manfizy]

thanx for your reply. would you please gime an example coz i tried using tht method and it doesnt seem to work for me

[Manfizy]

Hey,i figured out how do it.Thanx for the hint
cheerz!!

[Steve11235]

Note that BigDecimal is immutable, so you have to create a new one each time you manipulate it.
double myDouble = 1879.1106288532678d;
BigDecimal myBD = null;

myBD = new BigDecimal(myDouble);
myBD = myBD.setScale(3, BigDecimal.ROUND_HALF_UP);

myBD now contains the value rounded off to 3 decimal places.

Use the Formatter class to format the value as a String with an exponent.