Here you can find the source of getFiles(List
public static List<String> getFiles(List<String> l, String directory)
//package com.java2s; /*// w w w . j ava 2s . co m * Utils.java * * Created on May 8, 2007, 10:20 PM * * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright (C) 2007 Cheok YanCheng <yccheok@yahoo.com> */ import java.io.*; import java.util.*; public class Main { public static List<String> getFiles(List<String> l, String directory) { if (l == null) { l = new ArrayList<String>(); } File file = new File(directory); if (file.isDirectory()) { String[] children = file.list(); for (int i = 0; i < children.length; i++) { getFiles(l, new File(file, children[i]).getAbsolutePath()); } } else { if (file.isFile()) { l.add(directory); } } return l; } }