[armedbear-devel] One (probably) stupid question

[Mark Evenson]

On 5/18/12 13:14 , Francisco Vides Fernández wrote:
[…]

> How can I invoke a method with a boolean as an argument. I try to do the
> following:
>
> ---8<---
> (let* ((jlclass (jclass "java.lang.Class"))
>         (for-name (jmethod  jlclass "forName"
>                 (jclass "java.lang.String")
>                 (jclass "boolean")
>                 (jclass "java.lang.ClassLoader"))))
>    (jstatic for-name jlclass "org.postgresql.Driver" t
> (get-current-classloader)))
> ---8<---
> But it raises the error:
>
> The value T is not of class boolean
>     [Condition of type ERROR]
>
> I tried replacing '(jclass "boolean") for '(jclass "java.lang.Boolean"),
> but in that case it doesn't find the for-name method.
>
> How am I supposed to invoke the method!

Use the Java primitive for boolean truth bound to the constant 
JAVA:+TRUE+ instead of t.

Not a stupid question at all:  it should probably should go in our FAQ…


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