Thanks for the education Ty. I now understand the Glib is necessary and
not something Netbeans has introduced. It does seem strange that the
programs still seem to run properly and display just fine. Maybe I'll
try to reinstall Glib then.
Bayless
On 5/23/20 11:42 AM, Ty Young wrote:
On 5/13/20 9:03 AM, Bayless Kirtley wrote:
I'm still getting multiple error messages whenever I run a Java
project under Netbeans 11.1 on Linux Mint 19.3, OpenJDK 8. These are
samples of the messages.
(java:3065): GLib-GObject-WARNING **: 08:52:31.588:
../../../../gobject/gsignal.c:1253: unable to lookup signal
"window-state-event" of unloaded type 'GtkWidget'
(java:3065): GLib-GObject-CRITICAL **: 08:52:31.588:
g_signal_add_emission_hook: assertion 'signal_id > 0' failed
(java:3065): GLib-GObject-WARNING **: 08:52:33.532: invalid cast from
'GtkToplevelAccessible' to 'JawToplevel'
That last one repeats over and over. I have never knowingly used
GLib, GtkWidget or JawTopLevel. What is going on here?
Bayless
TL;DR:
Swing/AWT/JavaFX aren't magically cross-platform: they have to do
basic integration with each underlying platform's UI API.
GLib/GTKGtkWidget are a dependency/component of GTK. GTK is the major
Linux UI API used by various desktops and applications.
What seems to be happening here is that something broke in that
integration layer(bindings), which allow Java to communicate with GTK,
is broken somehow. What I don't understand is why it's only happening
when running a project, Netbeans probably shouldn't be running either.
I wonder, did you install updates without rebooting? That tends to
introduce issues like this.
Otherwise it might be Linux distros packaging something wrong, as
others have suggested. Maybe try installing and using Java 11 instead?
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