Here you can find the source of createTempFolder()
public static File createTempFolder()
//package com.java2s; import java.io.File; import java.util.UUID; public class Main { public static File createTempFolder() { File file = removeableFile(tempFolder(), UUID.randomUUID() .toString());/*w w w .j a v a2 s.c o m*/ file.mkdirs(); return file; } private static File removeableFile(File folder, String fileName) { File file = new File(folder, fileName); file.deleteOnExit(); return file; } private static File tempFolder() { return new File(tempFolderName()); } private static String tempFolderName() { return System.getProperty("java.io.tmpdir"); } }