Here you can find the source of delete(File file)
public static void delete(File file) throws IOException
//package com.java2s; /*//from w w w . j a v a2 s .c o m * Copyright 2008-2009 MOPAS(Ministry of Public Administration and Security). * * 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 delete(File file) throws IOException { if (file.isDirectory()) { // it's a folder, list children first File[] children = file.listFiles(); for (int i = 0; i < children.length; i++) { delete(children[i]); } } if (!file.delete()) { throw new IOException("Unable to delete " + file.getPath()); } } }