Here you can find the source of getFiles(final File dir)
public static List<File> getFiles(final File dir)
//package com.java2s; /*//from w ww. j a v a 2 s . c o m * Copyright (C) 2010 vektor * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.io.File; import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class Main { public static List<File> getFiles(final File dir) { final List<File> result = new ArrayList<File>(); final File[] filesAndDirs = dir.listFiles(); if (filesAndDirs == null) { System.out.println(dir); } final List<File> filesDirs = Arrays.asList(filesAndDirs); for (File file : filesDirs) { result.add(file); if (!file.isFile() && file.isDirectory()) { result.addAll(getFiles(file)); } } return result; } }