Here you can find the source of getTempDir()
public static File getTempDir()
//package com.java2s; /*/*from w w w . j ava 2 s. co m*/ * Copyright 2013 Adam L. Davis * * 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 { public static File getTempDir() { String temp = System.getProperty("java.io.tmpdir"); System.out.println("OS current temporary directory is " + temp); if (null == temp) { return new File("/tmp"); } return new File(temp); } }