Here you can find the source of mkdirs(File parent, String name, boolean mkdirs)
public static File mkdirs(File parent, String name, boolean mkdirs) throws IOException
//package com.java2s; /*//from w w w .ja v a2 s.c om * Copyright 2010-2012 Roger Kapsi * * 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 { /** * Creates and returns a {@link File} for the given path. * * NOTE: It's being assumed the path represents a directory! */ public static File mkdirs(String path, boolean mkdirs) throws IOException { return mkdirs(new File(path), mkdirs); } /** * Creates and returns a {@link File} for the given path and name. * * NOTE: It's being assumed the path represents a directory! */ public static File mkdirs(File parent, String name, boolean mkdirs) throws IOException { return mkdirs(new File(parent, name), mkdirs); } private static File mkdirs(File dir, boolean mkdirs) throws IOException { if (mkdirs && !dir.exists()) { dir.mkdirs(); if (!dir.exists()) { throw new IOException(); } } return dir; } }