Here you can find the source of emptyDir(String path)
public static void emptyDir(String path) throws IOException
//package com.java2s; /*//from w w w . jav a2s. co m * Copyright 2014 Alexey Plotnik * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.File; import java.io.IOException; public class Main { public static void emptyDir(String path) throws IOException { File dir = new File(path); assert dir.isDirectory(); for (File file : dir.listFiles()) { delete(file); } } public static void delete(String path) throws IOException { delete(new File(path)); } public static void delete(File file) throws IOException { if (!file.exists()) return; if (file.isDirectory()) { if (file.list().length == 0) { file.delete(); } else { String files[] = file.list(); for (String temp : files) { File fileDelete = new File(file, temp); delete(fileDelete); } //check the directory again, if empty then delete it if (file.list().length == 0) { file.delete(); } } } else { file.delete(); } } }