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Re: Java Bridge Question [message #50093 is a reply to message #46522]

Thu, 14 September 2006 05:38

Nigel Wade
Messages: 286
Registered: March 1998

Senior Member

pskellicker@ameritech.net wrote:

> I would suggest verifying what is in the .jar file:
>
>> jar tf TryGeometry.jar
> .. should dump out the class names in the jar file. Verify you have
> a class called Point and not ("fanning.com.Point" or "point" or
> "TryGeometry$Point")
>
> Then verify that there is a public constructor for Point that takes 2
> floats as parameters.
>
>> javap -classpath TryGeometry.jar Point
> Should dump out the public methods of Point.
>

If the constructor was invalid/missing the error would be:

% Constructor Point::Point(float,float) not found

I would agree that you need to look at the structure of the jar. Did you include
any paths in the jar? i.e. did you create the jar from the directory containing
the class files and specify them as *.class, so that there is no preceding
path? Java is very fussy about paths and packages, and the path must match the
package declaration exactly.

jar tf TryGeometry.jar

should list at least:

META-INF/
META-INF/MANIFEST.MF
Point.class

--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555

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[Message index]

		java bridge question By: Antonio Santiago on Fri, 25 November 2005 00:24
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 06:25
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 06:50
		Re: Java Bridge Question By: Nigel Wade on Thu, 14 September 2006 05:38
		Re: Java Bridge Question By: Mike Wallace on Wed, 13 September 2006 23:37
		Re: Java Bridge Question By: pskellicker on Wed, 13 September 2006 17:39
		Re: Java Bridge Question By: David Fanning on Wed, 13 September 2006 10:31
		Re: Java Bridge Question By: news.qwest.net on Thu, 14 September 2006 12:07
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 10:37
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 09:34
		Re: Java Bridge Question By: Mike Wallace on Thu, 14 September 2006 09:21
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 08:59
		Re: Java Bridge Question By: Maarten[1] on Thu, 14 September 2006 08:37
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 08:19
		Re: Java Bridge Question By: David Fanning on Thu, 14 September 2006 08:13
		Re: Java Bridge Question By: Mike Wallace on Thu, 14 September 2006 08:01

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