package recurs1;

import java.io.*;
import java.util.*;

public class j4 {

    public static void list1(File dir, String lvl) {
        if(dir.isDirectory())
        {
            File dirs[] = dir.listFiles((File current, String name) -> {
                return new File(current, name).isDirectory();
            });
            System.out.printf("%s\n", dir.getName());
            for (int j = 0; j < dirs.length; j++) if(dirs[j].isDirectory()){
                System.out.print(lvl);
                System.out.print("--");
                if(j == dirs.length-1)
                    lvl = lvl.substring(0, lvl.length()-1) + ' ';
                list1(dirs[j], lvl+"   |");
            }
        }
    }

    public static void list1(File dir) {
        list1(dir, "   |");
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String path = "src";    //здесь указывать путь к папке
        File dir = new File(path);
        if(!dir.exists())
        {
            System.out.println("there's no such path");
            return;
        }
        list1(dir);
    }
}