Hi, I found that [math] still wont compile on JDK 1.3 due to the super(throwable) constructors in MathException. Should we just write off 1.3 users, now that a reasonable 1.4 is available on basically all platforms which run Java at all? Unless I'm mistaken, Brent's patch contained some corrections for this problem.
Further, there still wasn't a conclusion on what to do with analysis.ConvergenceException, which is used in util.ContinuedFraction only, and also is a RuntimeException instead of a checked Exception.
Point one: given the current code, it seems to be misplaced.
Point two: Falling out of the loops in the root finders actually indicates a convergence problem (either too stringent accuracy settings, ill conditioned functions causing oscillations or a bug in the algorithm) I'd like to use a ConvergenceException for this condition too, however, throwing a mix of checked and unchecked exceptions for conditions of comparable complexity is something I'd rather avoid.
Possible solutions: 1. abolish ConvergenceException completely and replace it in ContinuedFraction by a (checked) MathException. This will cause adding a "throws MathException" in a heck of a lot of places, including on gamma and beta functions and everywhere they are used. The discussion whether the kind of functions should throw a checked exception wans't conclusive yet. 2. derive ConvergenceException from MathException (and palce it in [math] root), further see above. 3. make MathException a runtime exception and replace ConvergenceException with a MathException. 4. make MathException a runtime exception and derive ConvergenceException from MathException. 5. Leave as is but move ConvergenceExcpetion to [math] root 6. as 5 but move to [math]/util
Any ideas/recomendations/votes?
J.Pietschmann
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