readfile - read folder structure from a text file and create the structure - java -

i have text file content below list folder structure:

/root1      /folder1         /file1     /folder2         /file1     /folder3         /file1 /root2      /folder1         /file1     /folder2         /file1     /folder3         /file1 

is there better way implement java program solving kind of problem? or have read through each line in file?

i new java not sure better libraries there reading files in java.

thank you.

i think quite specific task, , don't know libraries out of box. main idea want keep note of current ancestors of processed line. can stack. wanted find out if algorithm works coded , work :) hope helps.

import java.io.file; import java.io.ioexception; import java.util.arraylist; import java.util.list; import java.util.scanner; import java.util.stack;  public class dirstucturereader {    private static final int indentation = 4;    public static void main(string[] args) throws exception {     directory result = new dirstucturereader().read(new file("testfile.txt"));     system.out.println(result);   }    public directory read(file file) throws ioexception {     scanner scanner = new scanner(file);     stack<directory> directorystack = new stack<>();     directory root = new directory("/"); // root directory     directorystack.add(root);     while (scanner.hasnextline()) {       processline(scanner.nextline(), directorystack);     }      return root;   }    private void processline(string line, stack<directory> directorystack) {     int nleadingspaces = getnumberofleadingspaces(line);     if (nleadingspaces == -1) return;     int depth = nleadingspaces / indentation;     while (directorystack.size() > depth + 1) {       directorystack.pop(); // discard elements stack when deep , jump 1 or more levels     }     string dirname = line.substring(nleadingspaces + 1);     directory directory = new directory(dirname);     directorystack.peek().getchildren().add(directory); // add directory children of proper parent dir     directorystack.push(directory);   }    private int getnumberofleadingspaces(string line) {     (int = 0; < line.length(); i++) {       if (line.charat(i) != ' ') return i;     }      return -1;   }    public static class directory {     private list<directory> children = new arraylist<>();      private final string name;      public directory(string name) {       this.name = name;     }      public string getname() {       return name;     }      public list<directory> getchildren() {       return children;     }   } }