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From Gilles Sadowski <gil...@harfang.homelinux.org>
Subject [Math] Confusing (?) use of "getInstance()" in formatting classes
Date Tue, 26 Jul 2011 12:19:24 GMT
Hi.

[This is related to issue MATH-622.]

Looking at the "CompositeFormat" and "RealVectorFormat", I notice an unusual
use of the "getInstance" method name. Unless I'm mistaken, "getInstance" is
most often used when the object stores a reference to a singleton. And in
those class, this does not seem to be the case: When I write
---
  RealVectorFormat.getInstance().getFormat().setMaximumFractionDigits(6);
---
the output is unaffected, the default being to display 2 fraction digits),
which is not suitable for debugging.

I think that there should be a way to modify at once all outputs formatted
through "CompositeFormat", i.e. an actual singleton instance of "NumberFormat"
that is used by all "default" formatting.

Do you agree? Any caveats?


Regards,
Gilles

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