Here you can find the source of makeTempDir()
public static File makeTempDir() throws IOException
//package com.java2s; /**/*from ww w . ja v a2s . c o m*/ * Copyright 2010 TransPac Software, 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; import java.io.IOException; public class Main { public static File makeTempDir() throws IOException { File tmpFile = File.createTempFile("temp-dir", "tmp"); tmpFile.deleteOnExit(); String filename = tmpFile.getCanonicalPath(); String dirname = filename.substring(0, filename.length() - 4); File tmpDir = new File(dirname); if (!tmpDir.mkdir()) { throw new IOException("Can't create temp directory: " + dirname); } return tmpDir; } }