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import java.util.Scanner; import java.util.ArrayList; import java.util.Arrays; public class ATMSystem { static ArrayList<String> username = new ArrayList<>(Arrays.asList("vidya", "vamsi", "sai", "devi")); static ArrayList<String> password = new ArrayList<>(Arrays.asList("vidya1", "vamsi2", "sai3", "devi4")); static ArrayList<Integer> pin = new ArrayList<>(Arrays.asList(0000, 1111, 2222, 3333)); static ArrayList<Integer> balance = new ArrayList<>(Arrays.asList(1000, 4000, 6000, 7000)); static Scanner scanner = new Scanner(System.in); public static void withdrawal(int i) { System.out.println("Enter Your Amount To Withdraw:"); int amount = scanner.nextInt(); System.out.println("Enter Your PIN:"); int pincode = scanner.nextInt(); if (pincode != pin.get(i)) { System.out.println("Incorrect PIN"); System.out.println("END"); } else { if (amount > balance.get(i)) { System.out.println("Insufficient Balance"); } else { balance.set(i, balance.get(i) - amount); System.out.println("Withdrawal Successful"); System.out.println("Do You Want to Know your Available Balance? Yes/No"); scanner.nextLine(); // Consume newline String q = scanner.nextLine(); if (q.equals("No")) { System.out.println("Thank You for Banking, Visit Us Again."); } else { System.out.println("The Available Balance is " + balance.get(i)); System.out.println("Thank You for Banking, Visit Us Again."); } } } } public static void deposit(int i) { System.out.println("Enter Your Amount:"); int amount = scanner.nextInt(); System.out.println("Enter Your PIN:"); int pincode = scanner.nextInt(); if (pincode != pin.get(i)) { System.out.println("Incorrect PIN"); System.out.println("END"); } else { balance.set(i, balance.get(i) + amount); System.out.println("Deposit Successful"); System.out.println("Do You Want to know your Available Balance? Yes/No"); scanner.nextLine(); // Consume newline String q = scanner.nextLine(); if (q.equals("No")) { System.out.println("Thank You for Banking, Visit Us Again."); } else { System.out.println("The Available Balance is " + balance.get(i)); System.out.println("Thank You for Banking, Visit Us Again."); } } } public static void checkBalance(int i) { System.out.println("Enter Your PIN"); int pincode = scanner.nextInt(); if (pincode != pin.get(i)) { System.out.println("Incorrect PIN"); System.out.println("END"); } else { System.out.println("Your Available Balance: " + balance.get(i)); System.out.println("Thank You for Banking, Visit Us Again."); } } public static void changePassword(int i) { System.out.println("Enter Your Current Password:"); scanner.nextLine(); // Consume newline String cp = scanner.nextLine(); while (true) { if (!cp.equals(password.get(i))) { System.out.println("Enter Your Correct Password:"); cp = scanner.nextLine(); } else { System.out.print("Enter Your New Password:"); String np = scanner.nextLine(); System.out.print("Re-enter Your New Password:"); String np1 = scanner.nextLine(); if (!np1.equals(np)) { System.out.println("Password Doesn't Match"); } else { password.set(i, np); System.out.println("Password Changed Successfully"); System.out.println("Thank You for Banking, Visit Us Again."); break; } } } } public static void ATM() { System.out.println("Enter Your UserName:"); String user_name = scanner.nextLine(); if (!username.contains(user_name)) { System.out.println("END"); } else { int i = username.indexOf(user_name); System.out.println("Enter Your Password"); String passcode = scanner.nextLine(); int flag = 0; if (!passcode.equals(password.get(i))) { System.out.println("Incorrect Password,Enter Correct password,only 2 chances left"); passcode = scanner.nextLine(); if (!passcode.equals(password.get(i))) { System.out.println("Incorrect Password,Enter Correct password,only 1 chance left"); passcode = scanner.nextLine(); if (!passcode.equals(password.get(i))) { System.out.println("Account Blocked"); System.out.println("END"); } else { flag = 1; } } else { flag = 1; } } else { flag = 1; } if (flag == 0) { System.out.println("END"); } else { System.out.println("Enter Your Choice:"); System.out.println("1.Withdrawal"); System.out.println("2.Deposit"); System.out.println("3.Check Balance"); System.out.println("4.Change Password"); int choice = scanner.nextInt(); while (true) { if (choice < 1 || choice > 4) { System.out.println("Enter a Valid Choice"); choice = scanner.nextInt(); } else { switch (choice) { case 1: System.out.println("************Withdrawal**************"); withdrawal(i); break; case 2: System.out.println("************Deposit************"); deposit(i); break; case 3: System.out.println("************Check Balance*************"); checkBalance(i); break; case 4: System.out.println("************Change Password*************"); changePassword(i); break; } break; } } } } } public static void main(String[] args) { ATM(); } }
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