[java] Printing a double to 2 decimal places in Java 1.4
Author
Hi,
Can someone give me an example of printing a double to 2 decimal places in java - I am trying to understand how this DecimalFormat works and I don't seem to be getting it right. From the API I know this function exists but what is FieldPosition and what parametes does it take ?
public StringBuffer format(double number,
StringBuffer result,
FieldPosition fieldPosition)
I am on the right track right that I have to use this function to do this ?
Thanks
Apart from using the printf function...
(Or something like that, my C is rusty and I never did that with Java before, only know that it is available from 1.5+)
...You can create a number formatter instance using a pattern ("#.##", to be more specific).
Son Of Cain
float f = 2.3567f;System.out.printf("%.2f", f);(Or something like that, my C is rusty and I never did that with Java before, only know that it is available from 1.5+)
...You can create a number formatter instance using a pattern ("#.##", to be more specific).
Son Of Cain
Here's the 1.4 way.
import java.text.*;public class Test{ public static void main(String[] args) { double d = 1.234567; DecimalFormat df = new DecimalFormat("#.##"); System.out.print(df.format(d)); }}
I find this easiest
double d = 12.345678;int r = (int)(d * 100);double f = r / 100.0;System.out.println(f);
capn_midnight's method will fail if one decimal place is enough for a lossless back n forth (print'n'parse) transformation.
bsh % double d = 5;
bsh % int r = (int)(d * 100);
bsh % double f = r / 100.0;
bsh % print(f);
5.0
duh :)
bsh % double d=5;
bsh % int r=(int)Math.round(d*100);
bsh % print((r/100)+"."+(r%100<
bsh % double d = 5;
bsh % int r = (int)(d * 100);
bsh % double f = r / 100.0;
bsh % print(f);
5.0
duh :)
bsh % double d=5;
bsh % int r=(int)Math.round(d*100);
bsh % print((r/100)+"."+(r%100<
My post has been capped o_O
bsh % double d=5;
bsh % int r=(int)Math.round(d*100);
bsh % print((r/100)+"."+(r%100<
bsh % double d=5;
bsh % int r=(int)Math.round(d*100);
bsh % print((r/100)+"."+(r%100<
Its not my fault that this forum software is badly written.
Oh and I know about html entities... thanks for your worries. Its just... I've never seen a forum, which cant handle the escaping by itself. Its very basic stuff after all.
And login... I dont really feel like registering here. This half-dead subforum wont justify the trouble :P
Oh and I know about html entities... thanks for your worries. Its just... I've never seen a forum, which cant handle the escaping by itself. Its very basic stuff after all.
And login... I dont really feel like registering here. This half-dead subforum wont justify the trouble :P
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
