@Override
	public int getIndexOfFirstMatchingEntry(List<File> data, String text) {
		// The data are sorted such that lower-case is before upper-case and smaller length 
		// matches come before longer matches.  If we ever find a case-sensitive exact match, 
		// use that. Otherwise, keep looking for a case-insensitve exact match.  The 
		// case-insensitive match is preferred over a non-matching item.  Once we get to a 
		// non-matching item, we can quit.
		int lastPreferredMatchIndex = -1;
		for (int i = 0; i < data.size(); i++) {
			File file = data.get(i);
			String filename = file.getName();
			if (filename.equals(text)) {
				// an exact match is the best possible match!
				return i;
			}

			if (filename.equalsIgnoreCase(text)) {
				// keep going, but remember this location, in case we don't find any more matches
				lastPreferredMatchIndex = i;
			}
			else {
				// we've encountered a non-matching entry--nothing left to search
				return lastPreferredMatchIndex;
			}
		}

		return -1; // we only get here when the list is empty
	}
A model that allows the {@link DropDownSelectionTextField} to work with File objects.
Ghidra/Framework/Docking/src/main/java/docking/widgets/filechooser/FileDropDownSelectionDataModel.java