Java tutorial
import java.io.File; import java.io.IOException; public class FileUtil { public static void main(String[] a) throws IOException { showDir(1, new File("d:\\Java_Dev")); } static void showDir(int indent, File file) throws IOException { for (int i = 0; i < indent; i++) System.out.print('-'); System.out.println(file.getName()); if (file.isDirectory()) { File[] files = file.listFiles(); for (int i = 0; i < files.length; i++) showDir(indent + 4, files[i]); } } }