import java.io.File;


public class DirContent {
	public static void Content(String DuongDan){
		File TepTin = new File(DuongDan);
		if (TepTin.isFile()){
			System.out.println("o " + TepTin.getName());
		} 
		else{			
		File[] NoiDung = TepTin.listFiles();
		System.out.println("- " +  TepTin.getName());
		for (int i = 0; i < NoiDung.length; i++) {
			Content(NoiDung[i].getAbsolutePath());		
		}
	}
}
	public static void main(String[] args) {
		String DuongDan = "D:\\Dir";
		Content(DuongDan);
	}
}