Here you can find the source of delete(File file)
public static boolean delete(File file)
//package com.java2s; /*// w w w. j av a 2 s . co m * ### * Phresco Commons * * Copyright (C) 1999 - 2012 Photon Infotech Inc. * * 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; public class Main { public static boolean delete(File file) { boolean deleteStatus = false; if (file.isDirectory()) { deleteStatus = deleteDir(file); } else { deleteStatus = file.delete(); } return deleteStatus; } private static boolean deleteDir(File dir) { if (dir != null && dir.isDirectory() && dir.exists()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } return dir.delete(); } }