B4J Question Problem with openjdk 19.x

[kpmais]

Hi everyone.
To convert centimeters to pixels, I use the following routine:

Private Sub GetPixelProCm As Int

    Dim jo As JavaObject
    jo.InitializeStatic("java.awt.Toolkit")
    jo = jo.RunMethod("getDefaultToolkit",Null)
    Return Floor(jo.RunMethod("getScreenResolution",Null)/2.18)

End Sub

This works fine with OpenJDK 14.x.
However, with OpenJDK 19.x, I get the following error when running:
java.lang.IllegalAccessException: class anywheresoftware.b4j.object.JavaObject cannot access class sun.awt.windows.WToolkit (in module java.desktop) because module java.desktop does not export sun.awt.windows to unnamed module @6224ccc0

at

 jo.RunMethod("getScreenResolution",Null)

I have not found any indication that the awt.toolkit has changed in openjdk 19.x.

Can anyone help me?
Many thanks to the readers.

 

[Daestrum]

Add (Tested in Java 23)

    #VirtualMachineArgs:  --add-exports java.desktop/sun.awt.windows=ALL-UNNAMED

 

[kpmais]

C'est formidable !!!
Thank you very much. It works!!!

I'll have to get into this topic.
Thanks again.

 

[kpmais]

Sorry, the joy is only partial.
It runs fine in debug and release.
However, when I produce a standalone app, the error occurs again. I'm using OpenJDK 19.x here as well.
I'll try a higher Java version.

 

[stevel05]

For the packager you will need to add:

#PackagerProperty: VMArgs = --add-exports java.desktop/sun.awt.windows=b4j

 

[Daestrum]

just add the similar command to the packager too (Steve beat me to it)

 

[kpmais]

Thanks again to both of you.
It works now .

But why is the assignment "=b4j" and not "=ALL-UNNAMED"?
I'm currently puzzling over that.

 

[stevel05]

But why is the assignment "=b4j" and not "=ALL-UNNAMED"?

Perplexity can answer that better than me, and it's too long to copy. See it's response here : https://www.perplexity.ai/search/why-when-exporting-virtualmach-UkozsfpOQ3m9_KZszfPsyw

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[kpmais]

Thank you