You'll need to with with the Constructor object returned from
Class.getConstructor(Class...).
Or use this:
(defn new-instance [#^Class c & args]
(if args
(.newInstance
(.getConstructor c (into-array Class (map class args)))
(into-array Object args))
(.newInstance c)))
On Mar 26, 12:51 pm, Miki <[email protected]> wrote:
> Hello,
>
> I'm trying the newInstance examples
> fromhttp://en.wikibooks.org/wiki/Learning_Clojure,
> however I get an error:
>
> Clojure 1.1.0
> user=> (new String "")
> ""
> user=> (. (identity String) newInstance "")
> java.lang.IllegalArgumentException: No matching method found:
> newInstance for class java.lang.Class (NO_SOURCE_FILE:0)
> user=> (.newInstance String "")
> java.lang.IllegalArgumentException: No matching method found:
> newInstance for class java.lang.Class (NO_SOURCE_FILE:0)
> user=> (.newInstance (identity String) "")
> java.lang.IllegalArgumentException: No matching method found:
> newInstance for class java.lang.Class (NO_SOURCE_FILE:0)
> user=>
>
> I can't use the "new" macro since I store several classes in a hash
> and pick the one I want in runtime (factory like).
>
> newInstance with no argument work though:
> user=> (.newInstance String)
> ""
> user=>
>
> Any ideas?
>
> Thanks,
> --
> Miki
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