Here you can find the source of deleteAllFiles(File dir)
public static void deleteAllFiles(File dir)
//package com.java2s; /*/* w ww .ja v a 2 s . co m*/ * Copyright (C) 2006 The Concord Consortium, Inc., * 25 Love Lane, Concord, MA 01742 * * 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 * * END LICENSE */ import java.io.File; public class Main { /** remove the whole directory */ public static void deleteAllFiles(File dir) { if (dir == null) return; File[] list = dir.listFiles(); if (list == null) return; for (File i : list) { if (i.isFile()) { i.delete(); } else { deleteAllFiles(i); } } } }