Java - Look for Files under given directory

Using Java utilities we can look for specific files matching specified pattern. Below is a sample:

Path rootDirectory = Paths.get(System.getProperty("user.dir")

+ "\\src\\test\\java");

String fileNamePattern = "*.{txt, doc}";

FileSystem fs = FileSystems.getDefault();

final PathMatcher pathMatcher = fs.getPathMatcher("glob:" + fileNamePattern);

FileVisitor<Path> pathMatcherVisitor = new SimpleFileVisitor<Path>() {

    @Override

    public FileVisitResult visitFile(Path file,

    BasicFileAttributes attribs) {

        Path name = file.getFileName();

        if (pathMatcher.matches(name)) {

            System.out.println(String.format("Matched file found: '%s'.", file));

        }

        return FileVisitResult.CONTINUE;

    }

};

Files.walkFileTree(rootDirectory, pathMatcherVisitor);

Hope this helps!