How to show java FileDialog in Front of Google Dev Tools (AlwaysOnTop does not work)

问题

I try to use following Java method to open a file selection dialog on top of all other windows (Windows7, Java 11).

However, the dialog is shown behind my Google Chrome Dev tools.

protected String result(String initialDirectory)  {         

        var fileDialog = new FileDialog(getFrame(), "Choose a file", FileDialog.LOAD);
        fileDialog.setIconImage(getDialogIcon());

        if (initialDirectory!=null) {
            fileDialog.setDirectory(initialDirectory);
        }

        fileDialog.setFocusable(true);          
        fileDialog.setLocationByPlatform(true);
        fileDialog.setVisible(true);    
        fileDialog.setAlwaysOnTop(true);
        fileDialog.toFront();
        fileDialog.repaint();

        var file = fileDialog.getFile();
        if(file != null) {
            var directory = fileDialog.getDirectory();
            var path =  directory + file;
            return path.replace("\\", "/");
        } else {
            return "";
        }           
    }

=> How can I ensure, that the file selection dialog is really shown on top of all other windows? Do I need to somehow monitor all windows and adapt some priority or so?