Here you can find the source of mkdir(String save)
public static void mkdir(String save)
//package com.java2s; /**/*w w w .jav a2 s. c om*/ * Copyright (c) 2013 Armin T?pfer * * This file is part of ProfileSim. * * ProfileSim is free software: you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation, either version 3 of the License, or any later version. * * ProfileSim is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with * ProfileSim. If not, see <http://www.gnu.org/licenses/>. */ import java.io.*; public class Main { public static void mkdir(String save) { if (!new File(save).exists()) { if (!new File(save).mkdirs()) { throw new RuntimeException("Cannot create directory: " + save); } } } }