Java SE (Java Platform, Standard Edition)

The code below does nothing. No file opened, no exception thrown, no output.
What can I do to discover the problem?
It does indeed execute the desktop.open(file) line.
Using JDK 1.16.0_81

File file = new File(pathAndFileString); // an existing text file
if (Desktop.isDesktopSupported()) {
	Desktop desktop = Desktop.getDesktop();
	if (desktop.isSupported(Desktop.Action.OPEN )) {
		try {
			desktop.open(file);
		} catch (IOException e1) {
			e1.printStackTrace();
		}
	}
	else {
		System.out.println("Desktop.Action.OPEN not supported");
	}
}
else {
	System.out.println("Desktop not supported");
}