Re: simple main example hello world

[Jamison Hope <jhope@alum.mit.edu>]

[-- Attachment #1: Type: text/plain, Size: 1672 bytes --]

That test.main method is not static, does not have return type void, and
does not take an argument of type String[].

Try something like

((main args::String[])::void allocation: ‘static (display “hello”)
(newline))


Or just put statements at the top level and not inside a
define-simple-class, and let the module itself be the main. The simplest
hello world is a file with nothing but (display “hello”), run with kawa -f
test.scm (or maybe just kawa test.scm without the -f, I don’t have my
computer handy right now).


On Sat, Sep 30, 2023 at 10:06 AM Damien Mattei via Kawa <kawa@sourceware.org>
wrote:

> what is th problem with this:
> ;; test.scm
> (module-name demo)
> (module-compile-options main: #t)
>
> (define-simple-class test ()
>
>   ;; Need a default constructor as well.
>   ((*init*) #!void)
>
>   ((main (args :: java.lang.Object))
>     (display "hello") (newline)
>     "hello"))
>
> bash-3.2$ kawa --main -C test.scm
> (compiling test.scm to demo)
> bash-3.2$ java -cp . test
> Error: Main method not found in class test, please define the main method
> as:
>    public static void main(String[] args)
> or a JavaFX application class must extend javafx.application.Application
>
> On Sat, Sep 30, 2023 at 3:25 PM Damien Mattei <damien.mattei@gmail.com>
> wrote:
> >
> > hello,
> > many years i used kawa for web application (.war)
> > now i want to do a simple standalone program but i can not find that
> > in my archive, i knew how to do it but just forget and i can not find
> > a tutorial (needed?) on kawa site.
> >
> > how is it done? from scratch.
> > regards,
> > Damien
>