DataFormat

[Dhiresh]

Hi,
 I have couple of questions regarding  Data formats
 
 For a  double value - I use  - style.setDataFormat(df.getFormat("0"));
 
 A positive double comes out fine but a negative double e.g. -432.44444 does 
not format to -432
 
What is the format to represent a negative double number?
 
I would like to know about percent as well.  I am using  - 
style.setDataFormat(df.getFormat("0.0%")); 
that works well for positive percentage but not for negative.
 
I would appreciate any help.
 
Thanks,
 
Dhiresh