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Re: Basic question: usage of Java methods in Octave

From: Michael Goffioul
Subject: Re: Basic question: usage of Java methods in Octave
Date: Tue, 15 Oct 2013 18:58:09 -0400

On Tue, Oct 15, 2013 at 6:15 PM, Michael Goffioul <address@hidden> wrote:
On Tue, Oct 15, 2013 at 5:27 PM, PhilipNienhuis <address@hidden> wrote:
Fedemone wrote
> Hi Philip,
> sorry forr late answer, I forgot in previous days...
> You are right, the code is really ugly, and my duty right now is to
> reverse-engineer it, in order to make this third-party-code usable locally
> in Octave rather than Matlab.
> That's where all the problems rise, and I'm try to do what you suggest: to
> dissect, to de-assembly in simplier code and to understand what are the
> single elements (some are surely variables, other are functions declared
> elsewhere, Integer and Float should be Java classes... a real mess).
> By the way, trying to use the Java Method seems a bit less intuitive than
> expected:
> octave:1> x = javaMethod('floatToIntBits', 'java.lang.Float', 10.07)
> error: [java] java.lang.IllegalArgumentException
> Actually no numer is accepted in this way, and any manual I'm lookin ginto
> is lacking of the very basic introduction to method usage...

Starting off with the basics:

(Octave-3.7.7+ on MinGW)

>> x = javaObject ("java.lang.Float", 10.07)
x =

<Java object: java.lang.Float>

>> x.floatToIntBits
error: [java] java.lang.NoSuchFieldException: floatToIntBits

## Field? This doesn't look right.

The current code only looks for method when you use a combination of . and (. That is something like:


That is probably another compatibility problem.

Actually, because it's a static method, it should be something like:


and that leads to the original java.lang.IllegalArgumentException as reported initially.


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