Re: NumberFormat output wrong?

On 16/04/2013 18:43, Thad wrote:
> NumberFormat has not worked the way I expected
> (see https://groups.google.com/d/msg/google-web-toolkit/zlbRIhTKqrA/cyjaDB12K6UJ for an
> experience with devmode vs production).
>
> On Monday, April 15, 2013 3:29:30 PM UTC-4, Patrick Tucker wrote:
>
> Today I noticed that the output of my NumberFormat (GWT 2.5.0) is not what I thought
> it had been set to. So I played with it a little and found the output to be inconsistent.
> The formats:
>
> 1: NumberFormat.getFormat("#,###.##")
> 2: NumberFormat.getFormat("#,###.00")
> 3: NumberFormat.getFormat("#,##0.00")
>
> The output is as follows:
>
> 1: 3.57, 0.98, 0.6
> 2: 3.57, .98, .60
> 3: 3.57, 0.98, 0.60
>
> The NumberFormat class doc states the following:
>
> 0 Number Yes Digit
> # Number Yes Digit, zero shows as absent
>
> According to the doc comments, show above, I was expect the following output for each
> format:
>
> 1: 3.57, .98, .6
> 2: 3.57, .98, .60
> 3: 3.57, 0.98, 0.60
>
> What going on here? The output for 1 should not have the leading 0, just like the
> 2nd format.

The "zero shows as absent" indication is terse and vague... We can suppose it is about
"non-significant zeroes", but it is better if explicitly stated!

Just note that Java's DecimalFormat just acts the same:

DecimalFormat[] nfs =
{
new DecimalFormat("#,###.##"),
new DecimalFormat("#,###.00"),
new DecimalFormat("#,##0.00")
};
double[] vals = { 3.57, 0.98, 0.6 };
for (DecimalFormat nf : nfs)
for (double v : vals)
System.out.println(nf.format(v));

==>

3,57
0,98
0,6
3,57
,98
,60
3,57
0,98
0,60

(French locale!)
I am not sure how to interpret that when reading the JavaDoc...

--
Philippe Lhoste
-- (near) Paris -- France
-- http://Phi.Lho.free.fr
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