Here you can find the source of cleanDirectory(String dir)
public static void cleanDirectory(String dir)
//package com.java2s; /**//from ww w . ja v a2 s . c o m * The MIT License * Copyright (c) 2016 Pablo Pacheco * <p> * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * <p> * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * <p> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.io.File; public class Main { public static void cleanDirectory(String dir) { File directory = new File(dir); if (directory.isDirectory()) { for (File f : directory.listFiles()) { f.delete(); } } } }