Java Utililty Methods File List Load

File dir = new File(imageFolder);
final String[] EXTENSIONS = new String[] { "gif", "png", "bmp", "jpg", "PNG", "JPG", "BMP", "GIF" 
};
FilenameFilter IMAGE_FILTER = new FilenameFilter() {
    @Override
    public boolean accept(final File dir, final String name) {
        for (final String ext : EXTENSIONS) {
            if (name.endsWith("." + ext)) {
...

validateDirectory(aStartingDir);
List<File> result = new ArrayList<File>();
File[] filesAndDirs = aStartingDir.listFiles();
List<File> filesDirs = Arrays.asList(filesAndDirs);
for (File file : filesDirs) {
    if (!file.isFile()) {
        List<File> deeperList = getFileListing(file);
        result.addAll(deeperList);
...

List<File> result = new ArrayList<File>();
for (String filename : dir.list())
    result.add(new File(dir, filename));
return result;

class JARFilter implements FilenameFilter {
    public boolean accept(File dir, String name) {
        return (name.endsWith(".jar"));
List result = new ArrayList();
File[] filesAndDirs = directory.listFiles();
List filesDirs = Arrays.asList(filesAndDirs);
...

List<File> list = new ArrayList<File>();
if (file.isDirectory()) {
    for (File f : file.listFiles()) {
        list.addAll(getFileListing(f));
} else {
    return Arrays.asList(new File[] { file });
return list;

List<File> list = new ArrayList<File>();
if (file.isDirectory()) {
    for (File f : file.listFiles()) {
        list.addAll(getFileListing(f, extension));
} else {
    List<File> l = new ArrayList<File>();
    for (String ext : extension) {
...

List<File> result = new ArrayList<File>();
File[] logfiles = aStartingDir.listFiles(new FileFilter() {
    @Override
    public boolean accept(File pathname) {
        return pathname.isFile();
});
List<File> logFilesList = Arrays.asList(logfiles);
...

List<File> result = new ArrayList<File>();
File[] filesAndDirs = aStartingDir.listFiles();
List<File> filesDirs = Arrays.asList(filesAndDirs);
for (File file : filesDirs) {
    result.add(file); 
    if (file.isDirectory() && recursive) {
        List<File> nestedList = getFileListingNoSort(file, recursive);
        result.addAll(nestedList);
...

File dir = new File(dirName);
extension = ext;
return dir.listFiles(new FilenameFilter() {
    @Override
    public boolean accept(File dir, String fileName) {
        return fileName.endsWith(extension);
});
...

List<File> files = new ArrayList<File>();
for (File f : dir.listFiles()) {
    if (!dir.exists())
        continue;
    if (f.isDirectory()) {
        List<File> _files = getFilesFromDir(f);
        files.addAll(_files);
        continue;
...