Java Utililty Methods Folder Read by Extension

List of utility methods to do Folder Read by Extension

  1. HOME
  2. Java
  3. F
  4. Folder Read by Extension

Description

The list of methods to do Folder Read by Extension are organized into topic(s).

Method

File[]getFiles(String path, String _exts)
get Files 
File dir = new File(path);
final String[] exts = _exts.split(";");
for (int i = 0; i < exts.length; i++) {
    exts[i] = exts[i].toLowerCase();
return dir.listFiles(new FilenameFilter() {
    @Override
    public boolean accept(File dir, String name) {
...
ListgetFiles(String path, String[] allowedExtension)
get Files 
List<File> r = new ArrayList<File>();
File rfolder = new File(path);
if (rfolder.exists() && rfolder.isDirectory()) {
    File[] files = rfolder.listFiles();
    for (File f : files) {
        if (isAllowedExtension(f.getName(), allowedExtension)) {
            r.add(f);
return r;
ListgetFiles2List(String path, String[] allowedExtension)
get Files List 
List<String> r = new ArrayList<String>();
File rfolder = new File(path);
if (rfolder.exists() && rfolder.isDirectory()) {
    File[] files = rfolder.listFiles();
    for (File f : files) {
        if (isAllowedExtension(f.getName(), allowedExtension)) {
            r.add(f.getName());
return r;
ListgetFilesFiteredByExtension(final File parent, final List extensions)
get Files Fitered By Extension 
final List<File> res = new ArrayList<File>();
if (!parent.isDirectory()) {
    return res;
for (final File file : parent.listFiles()) {
    if (matchByExtension(file, extensions)) {
        res.add(file);
return res;
File[]getFilesForType(final File target, final String extension)
get Files For Type 
File[] files = target.listFiles(new FileFilter() {
    public boolean accept(File pathname) {
        if (pathname.getName().indexOf(extension) != -1) {
            return true;
        return false;
});
...
String[]getFilesFromExtension(String directory, String[] extensions)
Given a directory and an array of extensions return an array of compliant files. 
List<String> files = new ArrayList<String>();
File currentDir = new File(directory);
String[] unknownFiles = currentDir.list();
if (unknownFiles == null) {
    return new String[0];
for (String unknownFile : unknownFiles) {
    String currentFileName = directory + System.getProperty("file.separator") + unknownFile;
...
File[]getFilesWithExtension(File aDirectory, final String aExtension)
Returns a list of files from a directory ending with a specific extension. 
return aDirectory.listFiles(new FileFilter() {
    public boolean accept(File lFile) {
        if (lFile.getName().endsWith(aExtension)) {
            return true;
        return false;
});
...
File[]getFilesWithExtension(File dir, String extension)
get Files With Extension 
List<File> fileList = new ArrayList<File>();
for (File file : dir.listFiles()) {
    if (file.getName().toLowerCase().endsWith("." + extension))
        fileList.add(file);
File[] fileListA = (File[]) fileList.toArray(new File[fileList.size()]);
return fileListA;
String[]getFilesWithExtension(String directory, String extension)
get an array of all files in the given directory, with given extension 
Vector<String> vector = new Vector<String>();
File f = new File(directory);
File[] files = f.listFiles();
for (int i = 0; i < files.length; i++) {
    if (files[i].getName().endsWith(extension)) {
        vector.add(files[i].getName());
String[] toReturn = new String[vector.size()];
vector.toArray(toReturn);
return toReturn;
ListgetFilesWithinPath(File path, String fileExtension)
Returns all the files within the parent directory (including sub-dirs) that have the supplied extension. 
List<File> result = new ArrayList<File>();
if (!path.isDirectory()) {
    if (fileExtension == null || fileExtension.equalsIgnoreCase(getFileExtension(path)))
        result.add(path);
    return result;
addChildFilesToList(path, result, fileExtension);
return result;
...