@Override
		public Component getListCellRendererComponent(JList<? extends File> list, File file,
				int index, boolean isSelected, boolean cellHasFocus) {

			super.getListCellRendererComponent(list, file, index, isSelected, cellHasFocus);

			setIcon(fileSystemView.getSystemIcon(file));
			setVerticalAlignment(SwingConstants.TOP);

			return this;
		}
A model that allows the {@link DropDownSelectionTextField} to work with File objects.
Ghidra/Framework/Docking/src/main/java/docking/widgets/filechooser/FileDropDownSelectionDataModel.java