Java Utililty Methods Folder Read

List<String> files = new ArrayList<>();
File folder = new File(dir);
File[] listOfFiles = folder.listFiles();
for (int i = 0; i < listOfFiles.length; i++) {
    if (listOfFiles[i].isFile()) {
        files.add(listOfFiles[i].getAbsolutePath());
    } else if (listOfFiles[i].isDirectory()) {
        System.out.println("Directory " + listOfFiles[i].getName());
...

ArrayList<File> files = new ArrayList<File>();
File[] filesOrDirs = new File(dir).listFiles();
for (File fileOrDir : filesOrDirs)
    if (fileOrDir.isFile())
        files.add(fileOrDir);
return files.toArray(new File[files.size()]);

File dir = new File(directoryPath);
if (dir.exists()) {
    return dir.list();
return null;

File dir = new File(dirName);
File[] files = dir.listFiles();
List<File> selectedFiles = new ArrayList<File>();
Random random = new Random();
int i = 0;
while (i < number) {
    int randomIndex = random.nextInt(files.length);
    File randomFile = files[randomIndex];
...

File folder = new File(folderName);
File[] files = folder.listFiles();
ArrayList<File> result = new ArrayList<File>(files.length);
for (File file : files) {
    if (file.isFile() && file.getName().startsWith(prefix)) {
        result.add(file);
return result;

File parentFile = new File(parent);
File[] files = parentFile.listFiles();
List<File> sonFiles = new ArrayList<File>();
if (parentFile.exists()) {
    for (File temp : files) {
        if (temp.isFile()) {
            sonFiles.add(temp);
return sonFiles;

File file = new File(path);
if (file.exists()) {
    return file.listFiles();
return null;

File file = new File(path);
File[] array = file.listFiles();
Arrays.sort(array, new Comparator<File>() {
    @Override
    public int compare(File file, File newFile) {
        if (file.lastModified() < newFile.lastModified()) {
            return 1;
        } else if (file.lastModified() == newFile.lastModified()) {
...

File pathFile = new File(path);
File[] files = pathFile.listFiles();
List<File> fileList = new ArrayList<File>();
if (files != null) {
    fileList.addAll(Arrays.asList(files));
return fileList;

File file = new File(path);
List<File> list = new ArrayList<File>();
if (file.exists()) {
    if (file.isFile()) {
        list.add(file);
    } else if (file.isDirectory()) {
        File[] files = file.listFiles();
        if (files != null) {
...