private void listFilesRecursively(File file) { if (file.isDirectory()) { System.err.printf("Directory %s:%n", file.getAbsoluteFile()); for (File child : file.listFiles()) { listFilesRecursively(child); } } else { System.err.printf("File %s%n", file.getAbsoluteFile()); } } public static void main(String[] args) { listFilesRecursively(new File(".")); }