[Java] files

public static List<File> files(String dirname) {
	if (dirname == null) {
		return Collections.emptyList();
	}

	File dir = new File(dirname);
	if (!dir.exists()) {
		return Collections.emptyList();
	}

	if (!dir.isDirectory()) {
		return Collections.singletonList(file(dirname));
	}

	return Arrays.stream(Objects.requireNonNull(dir.listFiles()))
		.collect(Collectors.toList());
}

https://stackoverflow.com/questions/1844688/how-to-read-all-files-in-a-folder-from-java/70650106#70650106

How to read all files in a folder from Java?