Java Utililty Methods Path File List nio

 Glob matcher is explained  java.nio.file.FileSystem#getPathMatcher(String)  getPatchMatcher . 
List<Path> result = new ArrayList<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStream(directory, glob)) {
    stream.forEach(result::add);
} catch (DirectoryIteratorException ex) {
    throw ex.getCause();
return result;

Deque<Path> stack = new ArrayDeque<>();
final List<Path> files = new LinkedList<>();
stack.push(path);
while (!stack.isEmpty()) {
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(stack.pop())) {
        for (Path entry : stream) {
            if (Files.isDirectory(entry)) {
                stack.push(entry);
...

final List<Path> result = new ArrayList<>();
Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
        result.add(file);
        return FileVisitResult.CONTINUE;
});
...

preorderList.add(path);
File[] listFiles = path.toFile().listFiles();
if (listFiles != null)
    for (File child : listFiles) {
        listFiles(child.toPath(), preorderList);

final PathMatcher matcher = path.getFileSystem().getPathMatcher("glob:" + glob);
final DirectoryStream.Filter<Path> filter = new DirectoryStream.Filter<Path>() {
    @Override
    public boolean accept(Path entry) throws IOException {
        return Files.isDirectory(entry) || matcher.matches(entry.getFileName());
};
List<Path> result = new ArrayList<Path>();
...

final List<Path> files = new ArrayList<>();
Files.walkFileTree(dir, new SimpleFileVisitor<Path>() {
    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
        if (filter.accept(file))
            files.add(file);
        return recursive ? FileVisitResult.CONTINUE : FileVisitResult.SKIP_SUBTREE;
});
return files;

List<String> filesInFolder = new ArrayList<String>();
Path pathP = Paths.get(path);
try {
    DirectoryStream<Path> rootStream = Files.newDirectoryStream(pathP);
    for (Path folderName : rootStream) {
        filesInFolder.add(folderName.getFileName().toString());
} catch (IOException e) {
...

String path = Paths.get(".").toAbsolutePath().normalize().toString();
try (Scanner scanner = new Scanner(new File(path + "/" + filePath))) {
    while (scanner.hasNext()) {
        words.add(scanner.nextLine());
    return words;

if (!Files.isDirectory(scenarioDirectory)) {
    throw new IllegalArgumentException(
            String.format("Path '%s' is not a directory.", scenarioDirectory.toAbsolutePath()));
File[] list = scenarioDirectory.toFile().listFiles(STEP_FILTER);
if (list == null || list.length == 0) {
    throw new IllegalStateException(
            String.format("No test steps found in directory: '%s'", scenarioDirectory.toAbsolutePath()));
...

List<String> indexes = new ArrayList<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStream(bwcIndicesPath, prefix + "-*.zip")) {
    for (Path path : stream) {
        indexes.add(path.getFileName().toString());
Collections.sort(indexes);
return indexes;
...