import java.io.File;
import java.util.Arrays;


public class Tree {
    public static void main(String[] args) {
        new App();
    }

}

class App{
    private File a;
    private String path;
    App(){
        path = "/home/asi2/carpeta";
        a = new File(path);
        doTree(0);
    }
    private void doTree(int depth) {
        File list[];
        StringBuilder sep = new StringBuilder();
        //Drawing the tree..
        for(int i = 0; i < depth; i++){
            if(i < depth - 1){
                sep.append("|   ");
            }
            else{
                sep.append("|-->");
            }
        }
        if(a.isDirectory()){
            System.out.println( sep.toString() + "(D)" + a.getName() );
            list = a.listFiles();
            Arrays.sort(list); //This will sort file objects in alphabetical order.
            for( int i = 0; i < list.length; i++ ){
                a = list[i];
                doTree(depth + 1); //Going deeper ohh yeah! xD
            }

        }
        else{
            System.out.println( sep.toString() + "(A)" + a.getName() );
            //just a file, nothing more to do
        }
    }
}