rounding

Hi,

I am attempting to round a number (float) to 2 decimal digits in java. How
is this possible?

Thanks,

--

Adrien Martel
cs2

One approach would be to multiply the number by 100, cast it to an int,
then divide it by 100.0. This would truncate instead of round.

> I am attempting to round a number (float) to 2 decimal digits in java. How
> is this possible?

http://www.xdweb.net/~dibblego/java...nswers.html#q28

--
Tony Morris
http://xdweb.net/~dibblego/

<klynn47@comcast.net> schreef in bericht
news:1103571572.279608.114830@c13g2000cwb.googlegroups.com...
> One approach would be to multiply the number by 100, cast it to an int,
> then divide it by 100.0. This would truncate instead of round.

Add 50 before multiplying and you will effectively round.  Note that a float
itself can never be rounded to exactly two decimal digits, unless the
correctly rounded fraction is .0, .25, .50 or .75.  This is because float an
d
double are numbers of base 2, not of base 10.

Adrien Martel wrote:
> Hi,
>
> I am attempting to round a number (float) to 2 decimal digits in java. How
> is this possible?
>
> Thanks,
>
> --
>
> Adrien Martel
> cs2
>
>

Check out the NumberFormat class. java.text.NumberFormat in the API. If
you have any trouble figuring out how to use it let us know. I'd be
happy to give you an example.

Paul