list all files from directories and subdirectories in Java

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As this answer shows up on top of google, i’m adding a java 7 nio solution for listing all files and directories, it is takes about 80% less time on my system. 

try {
    Path startPath = Paths.get("c:/");
    Files.walkFileTree(startPath, new SimpleFileVisitor<Path>() {
        @Override
        public FileVisitResult preVisitDirectory(Path dir,
                BasicFileAttributes attrs) {
            System.out.println("Dir: " + dir.toString());
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
            System.out.println("File: " + file.toString());    
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFileFailed(Path file, IOException e) {
            return FileVisitResult.CONTINUE;
        }
    });
} catch (IOException e) {
    e.printStackTrace();
}

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