Displaying Directories with recursive function - Java File Path IO

Java examples for File Path IO:Directory

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Description

Displaying Directories with recursive function

Demo Code

import java.io.File;
import java.util.Scanner;

public class DirList{
  static Scanner sc = new Scanner(System.in);

  public static void main(String[] args)
  {/*from   w  w  w.  j  a v  a  2 s .com*/
    System.out.print("Welcome to the Directory Lister");
    do
    {
      System.out.print("\nEnter a path: ");
      String path = sc.nextLine();

      File dir = new File(path);
      if (!dir.exists() || !dir.isDirectory())
        System.out.println("\nThat directory doesn't exist.");
      else
      {
        System.out.println("\nListing directory tree of:");
        System.out.println(dir.getPath());
        listDirectories(dir, "  ");
      }
    } while(askAgain());
  }

  private static void listDirectories(File dir, String indent)
  {
    File[] dirs = dir.listFiles();
    for (File f : dirs)
    {
      if (f.isDirectory())
      {
        System.out.println(indent + f.getName());
        listDirectories(f, indent + "  ");
      }
    }
  }

  private static boolean askAgain()
    {
    System.out.print("Another? (Y or N) ");
    String reply = sc.nextLine();
    if (reply.equalsIgnoreCase("Y"))
      return true;
    return false;
  }
}

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