Java tutorial
import java.io.File; import java.util.HashSet; import java.util.Set; public class Main { public static void main(String[] argv) { Set<File> all = new HashSet<File>(); getAllFileAndFolder(new File("c:\\"), all); } public static void getAllFileAndFolder(File folder, Set<File> all) { all.add(folder); if (folder.isFile()) { return; } for (File file : folder.listFiles()) { all.add(file); if (file.isDirectory()) { getAllFileAndFolder(file, all); } } } }