Re: Sisc and AWT ....

Roberto,

Roberto Brunelli <[email protected]> writes:

> Scott,
>
> thanks for the pointer.
>
> I'm trying to go through the (admittedly short) tutorial
>
> 	(import s2j)
> 	(import generic-procedures)
>
> 	(define-generic show-input-dialog)
> 	(define <option-pane> (java-class '|javax.swing.JOptionPane|))
> 	(define x (show-input-dialog <option-pane> (->jstring "Enter an integer:")))
>
> but then I get
>
> Error: no applicable method for args (#<java java.lang.Class javax.swing.JOptionPane> 
> #<java java.lang.String Enter an integer:>) in generic procedure #0=#<procedure 
> show-input-dialog>
>
> any help (including sections of sisc/java manuals that should  help me)?

try

(import s2j)
(import generic-procedures)
(define-generic-java-method show-input-dialog)
(define <option-pane> (java-class '|javax.swing.JOptionPane|))
(define x (show-input-dialog (java-null <option-pane>) (->jstring "Enter
an integer:")))


Note the call to java-null. See
http://sisc.sourceforge.net/manual/html/ch08.html#JavaUsage and
http://sisc.sourceforge.net/manual/html/ch08.html#JavaMethods ("Static
Java methods can be invoked by passing an instance of the appropriate
class or an appropriately typed null object as the first argument to the
procedures").


Matthias.

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