Here you can find the source of mkdirs(File folder)
public static int mkdirs(File folder)
//package com.java2s; /*//from ww w .ja v a 2 s .com * Copyright (C) Mike Murphy 2003-2015 <mike.murphy@xmlactions.org><mwjmurphy@gmail.com> * * 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 { /** * mkdirs for folderName * * @return -1 if unable to mkdir, -2 if unable to setLastModified, 0 if ok */ public static int mkdirs(File folder) { if (folder.exists() == false) { if (folder.mkdirs() == false) { return (-1); } } return (0); } }