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From "Stephen Colebourne" <>
Subject [lang] Money/Units/Quantities [was Re: Conversion utilities]
Date Thu, 14 Nov 2002 21:29:03 GMT is the most well known units and quantities
package. It also follows the JSR on the subject. In some ways, it would be
nice to see this work brought under the Jakarta Commons group, as there is
much useful code there.

Even if we don't intend to have a whole units package in [lang], we should
probably have Money and Currency classes. They are pretty fundamental to
many business applications. (I don't think that a [money] is required here


----- Original Message -----
From: "Henri Yandell" <>
To: "Jakarta Commons Developers List" <>
Cc: <>
Sent: Thursday, November 14, 2002 7:54 PM
Subject: Re: Conversion utilities

> On Thu, 14 Nov 2002, Jeff Varszegi wrote:
> > Janek,
> >
> > I made an interface called Range that is supported by classes called
> > ComparableRange etc.  The ComparableRange class can use any objects
> > that support Comparable (or, alternately, any objects with a supplied
> > Comparator), and I also made specific versions for Date and Double to
> +1. Why did no one think of this before? We're all fined one weeks pay.
> > eliminate unnecessary casting.  I needed the Date one for code I'm
> > writing.  I didn't get the time to implement any for primitive types
> > yet.
> > Range supports disjoint ranges of values, checking to see if a
> > value falls within the range, merging two ranges, etc.
> So this is like NumberRange, but genericises it and makes it cool?
> > I will send my code as soon as I can-- right now I'm setting up a home
> > network, and my laptop isn't on it yet.  In the meantime, can you post
> > the CurrencyRange code you've got?  Thanks a lot. I definitely think
> > it will be of general-purpose application.  I don't know of any
> > quantities library either, but I'd be thrilled to take a look at one.
> Jade's the only one I've heard of. By a guy over in .fr I think.
> For quantities that is, always heard good things of it.
> Hen
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