Here you can find the source of deleteAllFiles()
static void deleteAllFiles()
//package com.java2s; /*/*from w ww . j a va 2 s.c o m*/ * Copyright 2009 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. */ import java.io.File; import java.io.FileFilter; public class Main { static File workingDir = null; static final FileFilter CLASS_FILTER = new FileFilter() { public boolean accept(File pathname) { return pathname.getName().endsWith(".class"); } }; static final FileFilter JAR_FILTER = new FileFilter() { public boolean accept(File pathname) { return pathname.getName().endsWith(".jar"); } }; static final FileFilter F3_FILTER = new FileFilter() { public boolean accept(File pathname) { return pathname.getName().endsWith(".f3"); } }; static final FileFilter JAVA_FILTER = new FileFilter() { public boolean accept(File pathname) { return pathname.getName().endsWith(".java"); } }; static void deleteAllFiles() { deleteJavaFiles(); deleteF3Files(); deleteClassFiles(); deleteJarFiles(); } static void deleteJavaFiles() { deleteFiles(JAVA_FILTER); } static void deleteF3Files() { deleteFiles(F3_FILTER); } static void deleteClassFiles() { deleteFiles(CLASS_FILTER); } static void deleteJarFiles() { deleteFiles(JAR_FILTER); } static void deleteFiles(FileFilter filter) { File[] files = workingDir.listFiles(filter); for (File f : files) { f.delete(); } } }