Recursively create directory

Question

Does anyone know how to use Java to create sub-directories based on the alphabets (a-z) that is n levels deep?

 /a
    /a
        /a
        /b
        /c
           


        

Answer 1

I would write a little utility method that takes the start and the end letter as well as the desired deepth as parameters. This method calls itself recursively till done:

 private static void createAlphabetFolders(File parent, int start, int end, int deepth){

    if(deepth <= 0){
      return;
    }

    for (int i=start; i < end; i++){

      // create the folder
      String folderName = "" + ((char) i);
      File folder = new File(parent, folderName);
      System.out.println("creating: " + folder.getPath());
      folder.mkdirs();

      // call recursively
      createAlphabetFolders(folder, start, end, deepth-1);
    }
  }

One would call it like this:

createAlphabetFolders(new File("abctest"), 'A', 'E', 5);