java-gnome-hackers

[java-gnome-hackers] Timer problems

[Mark H. <mh...@ti...>]

Hi,
  I'm having trouble with the Timer object. The following method:

private static Fireable f;
  public static void invokeLater(Runnable run){
    Timer timer;
    final Runnable runner = run;

    f = new Fireable(){ 
      public boolean fire(){
        runner.run();
        return false;
      }
    };
    timer = new Timer(1, f); 
    timer.start();
  } 

always results in

java.lang.NullPointerException
        at org.gnu.gtk.Gtk.gtk_main(Gtk.java:native)
        at org.gnu.gtk.Gtk.main(Gtk.java:54)
        at com.tildemh.debbuggtk.BugWatcher.main(BugWatcher.java:454)

Any ideas why this is happening? 
Also, I think this method would be added to the main code - where should
it go? 
-- 
  .''`. Mark Howard
 : :' :
 `. `'  http://www.tildemh.com 
   `-   mh...@de... | mh...@ti... | mh...@ca... 

[java-gnome-hackers] Timer problems

[Mark H. <mh...@ti...>]

Hi,
  I'm having trouble with the Timer object. The following method:

private static Fireable f;
  public static void invokeLater(Runnable run){
    Timer timer;
    final Runnable runner = run;

    f = new Fireable(){ 
      public boolean fire(){
        runner.run();
        return false;
      }
    };
    timer = new Timer(1, f); 
    timer.start();
  } 

always results in

java.lang.NullPointerException
        at org.gnu.gtk.Gtk.gtk_main(Gtk.java:native)
        at org.gnu.gtk.Gtk.main(Gtk.java:54)
        at com.tildemh.debbuggtk.BugWatcher.main(BugWatcher.java:454)

Any ideas why this is happening? 
Also, I think this method would be added to the main code - where should
it go? 
-- 
  .''`. Mark Howard
 : :' :
 `. `'  http://www.tildemh.com 
   `-   mh...@de... | mh...@ti... | mh...@ca... 

Re: [java-gnome-hackers] Timer problems

[Tom B. <Tom...@Su...>]

On Wed, 2003-03-19 at 13:22, Mark Howard wrote:
> java.lang.NullPointerException
>         at org.gnu.gtk.Gtk.gtk_main(Gtk.java:native)
>         at org.gnu.gtk.Gtk.main(Gtk.java:54)
>         at com.tildemh.debbuggtk.BugWatcher.main(BugWatcher.java:454)
> 
> Any ideas why this is happening? 

No, but I'll look into it.  I had almost identical code in my VPN
client, but removed it when hitting the same bug.  Still, that should
work.

> Also, I think this method would be added to the main code - where should
> it go? 

I asked that question last month without any responses.  My suggestion
was to create a GLib.java which held untyped GLib routines, much as
Gtk.java and Gnome.java do.  If no one has objections, that's where I'll
put it.

BTW, I don't think Timer is the right way to implement invokeLater
(although I used the same approach).  My limited understanding of GLib
suggests that it's worth the extra work to support creating a new event
source (perhaps using g_main_context_add_poll()).  My suspicion is that
we'll be needing to define other event types over time.

Tom