import java.io.File;

import java.io.IOException;

import java.util.Scanner;

public class Base {

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

String flag = "1";

while(flag.contains("1"))

{

System.out.println("*****************************************************");

System.out.println("Welcome to LockedMe Portal...What would you like to do ?");

System.out.println("*****************************************************");

System.out.println("Enter: \n 1- To Retrieve the file name in Ascending Order \n 2- To Add the specified file Name \n 3- To Delete the specified file \n 4- To Search the specified file Name \n 5- To exit the application");

String a = sc.next();

performOperation(a);

System.out.println("Do you want to continue ? Enter 1 to continue..or enter anything else to exit");

flag = sc.next();

}

System.out.println("Thank you..Exiting now...!!");

}

private static void performOperation(String a) throws IOException {

Scanner s = new Scanner(System.in);

try

{

switch(a)

{

case "1":

System.out.println("Enter the directory Path where you want to perform Search(e.g C://Anand Backup)");

String c = s.nextLine();

//Creating a File object for directory

File directoryPath = new File(c);

//List of all files and directories

String contents[] = directoryPath.list();

System.out.println("List of files and directories(in Alphabetical Order) in the specified directory:");

for(int i=0; i<contents.length; i++) {

System.out.println(i+1 + ") "+ contents[i]);

}

break;

case "2":

System.out.println("Enter the file name you want to add...");

String fileName = s.nextLine();

System.out.println("Enter the Directory where you want to add the above file...(e.g C://Anand Backup)");

String directory = s.nextLine();

// creating the file based upon directory and fileName entered.

File file = new File(directory + "//"+ fileName);

if (!file.exists()) {

file.createNewFile(); // Create a new file if not exists.

System.out.println("File -" + fileName + " Added successfully ..!!");

}

else

System.out.println("File already exists..!!Please select a unique name for the file or delete the older file to add with the same name");

break;

case "3":

System.out.println("Enter the file name you want to delete...");

String DeletefileName = s.nextLine();

System.out.println("Enter the Directory from where you want to delete the above file...(e.g C://Anand Backup)");

String DeleteDirectory = s.nextLine();

// creating the file based upon directory and fileName entered.

File fileDelete = new File(DeleteDirectory + "//"+ DeletefileName);

if (!fileDelete.exists()) {

System.out.println("File is already Deleted..!!");

}

else

fileDelete.delete(); // Delete the file if exists.

System.out.println("File " + DeletefileName + " deleted successfully..!!");

break;

case "4":

System.out.println("Enter the file name you want to search...");

String SearchfileName = s.nextLine();

System.out.println("Enter the Directory path where you want to search the above file...(e.g C://Anand Backup)");

String SearchDirectory = s.nextLine();

// creating the file based upon directory and fileName entered.

File fileSearch = new File(SearchDirectory + "//"+ SearchfileName);

if (!fileSearch.exists()) {

System.out.println("File does not exists..!!");

}

else

System.out.println("File " + SearchfileName + " exists in the provided directory..!!");

break;

case "5":

System.out.println("Terminating the session");

break;

default:

System.out.println("Invalid Input...Pls enter any value out of 1 - 5");

break;

}

}

catch(NullPointerException e)

{

System.out.println("Please enter a valid directory path...!!"+e.getStackTrace());

}

}

}