Here you can find the source of forceMkdirs(File file)
public static final void forceMkdirs(File file) throws IOException
//package com.java2s; /*/*from ww w. jav a2s. c o m*/ * Copyright (C) 2009 Leandro de Oliveira Aparecido <lehphyro@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.*; public class Main { public static final void forceMkdirs(File file) throws IOException { if (file.exists() && file.isFile()) { throw new IOException("File [" + file + "] exists and is not a directory. Unable to create directory."); } if (!file.mkdirs()) { throw new IOException("Unable to create directory: " + file); } } }