commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Oliver Heger <oliver.he...@oliver-heger.de>
Subject Re: [math] should version 2.0 be targeted to Java 5 ?
Date Sun, 11 May 2008 17:11:43 GMT
Luc Maisonobe wrote:
> Mauro Talevi recently proposed a new package for general linear
> regression (https://issues.apache.org/jira/browse/MATH-203). This patch
> needs Java 5, mainly for annotations.
> 
> Mauro suggested to take the opportunity of the next [math] major version
> to switch to Java 5. A major version seems appropriate for such a
> change, but do we want to do it now ?
> 
> My personal opinion is that sticking to Java 1.3 is really obsolete and
> difficult. When I upgraded my Linux box recently, I had to search old
> backups to reinstall a JDK manually. Dropping this could simplify some
> codes (exceptions for example) and fix some errors (there is a known
> issue with unit tests since Java 1.3 does not compute trigonometric
> functions as it should).
> 
> If we decide to change minimal Java version, I would choose to target
> 1.5. It is widely adopted and deployed now and has many features which
> would be useful for a mathematical library:
>     - new Math functions (log10, cbrt, ulp, signum, cosh, sinh, tanh,
> hypot, expm1, log1p)
>     - autoboxing
>     - MathContext, RoundingMode
> In addition, there are the many features that are interesting for any
> type of Java development (enums, generics, annotations).
> 
> Java 6 brings even more Math functions (copysign, getExponent,
> nextAfter, nextUp, scalb), some of which we needed to add ourselves in
> MathUtils. However, I'm not sure it is as widely deployed than Java5.
> 
> Perhaps Java 7 would bring even more functions (asinh, acosh and atanh
> are still missing ...)
> 
> What do you think ?
> 
> Luc
> 
IMHO the time is right now for Java 1.5. I am not sure about the
adoption of higher versions, so with 1.5 you are probably on the safe side.

Oliver

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
For additional commands, e-mail: dev-help@commons.apache.org


Mime
View raw message