FileUtil { public static final File createLocalTempFile(final File basefile, final String prefix, final boolean isDeleteOnExit) throws IOException { File tmp = File.createTempFile(prefix + basefile.getName(), "", basefile.getParentFile()); if (isDeleteOnExit) { tmp.deleteOnExit(); } return tmp; }  static Path[] stat2Paths(FileStatus[] stats); static Path[] stat2Paths(FileStatus[] stats, Path path); static boolean fullyDelete(final File dir); static boolean fullyDelete(final File dir, boolean tryGrantPermissions); static String readLink(File f); static boolean fullyDeleteContents(final File dir); static boolean fullyDeleteContents(final File dir, final boolean tryGrantPermissions); @Deprecated static void fullyDelete(FileSystem fs, Path dir); static boolean copy(FileSystem srcFS, Path src,
                             FileSystem dstFS, Path dst,
                             boolean deleteSource,
                             Configuration conf); static boolean copy(FileSystem srcFS, Path[] srcs,
                             FileSystem dstFS, Path dst,
                             boolean deleteSource,
                             boolean overwrite, Configuration conf); static boolean copy(FileSystem srcFS, Path src,
                             FileSystem dstFS, Path dst,
                             boolean deleteSource,
                             boolean overwrite,
                             Configuration conf); static boolean copy(FileSystem srcFS, FileStatus srcStatus,
                             FileSystem dstFS, Path dst,
                             boolean deleteSource,
                             boolean overwrite,
                             Configuration conf); static boolean copyMerge(FileSystem srcFS, Path srcDir,
                                  FileSystem dstFS, Path dstFile,
                                  boolean deleteSource,
                                  Configuration conf, String addString); static boolean copy(File src,
                             FileSystem dstFS, Path dst,
                             boolean deleteSource,
                             Configuration conf); static boolean copy(FileSystem srcFS, Path src,
                             File dst, boolean deleteSource,
                             Configuration conf); static String makeShellPath(String filename); static String makeShellPath(File file); static String makeShellPath(File file, boolean makeCanonicalPath); static long getDU(File dir); static void unZip(File inFile, File unzipDir); static void unTar(File inFile, File untarDir); static int symLink(String target, String linkname); static int chmod(String filename, String perm
                          ); static int chmod(String filename, String perm, boolean recursive); static void setOwner(File file, String username,
      String groupname); static boolean setReadable(File f, boolean readable); static boolean setWritable(File f, boolean writable); static boolean setExecutable(File f, boolean executable); static boolean canRead(File f); static boolean canWrite(File f); static boolean canExecute(File f); static void setPermission(File f, FsPermission permission
                                   ); static final File createLocalTempFile(final File basefile,
                                               final String prefix,
                                               final boolean isDeleteOnExit); static void replaceFile(File src, File target); static File[] listFiles(File dir); static String[] list(File dir); static String[] createJarWithClassPath(String inputClassPath, Path pwd,
      Map<String, String> callerEnv); static String[] createJarWithClassPath(String inputClassPath, Path pwd,
      Path targetDir,
      Map<String, String> callerEnv); static boolean compareFs(FileSystem srcFs, FileSystem destFs); static final int SYMLINK_NO_PRIVILEGE; }
@Test (timeout = 30000) public void testCreateLocalTempFile() throws IOException { setupDirs(); final File baseFile = new File(tmp, "base"); File tmp1 = FileUtil.createLocalTempFile(baseFile, "foo", false); File tmp2 = FileUtil.createLocalTempFile(baseFile, "foo", true); assertFalse(tmp1.getAbsolutePath().equals(baseFile.getAbsolutePath())); assertFalse(tmp2.getAbsolutePath().equals(baseFile.getAbsolutePath())); assertTrue(tmp1.exists() && tmp2.exists()); assertTrue(tmp1.canWrite() && tmp2.canWrite()); assertTrue(tmp1.canRead() && tmp2.canRead()); tmp1.delete(); tmp2.delete(); assertTrue(!tmp1.exists() && !tmp2.exists()); }