1.
//main.java
import java.io.*;
import java.text.*;
import java.util.*;
   public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("1.Current Account\n2.Savings Account");
        int choice = scanner.nextInt();
        scanner.nextLine(); // consume newline
        System.out.println("Name");
        String name = scanner.nextLine();
        System.out.println("Account Number");
        int number = scanner.nextInt();
        System.out.println("Account Balance");
        int balance = scanner.nextInt();
        scanner.nextLine(); // consume newline
        System.out.println("Enter the Start Date(yyyy-mm-dd)");
        String startDateStr = scanner.nextLine();
        System.out.println("Enter the Due Date(yyyy-mm-dd)");
        String dueDateStr = scanner.nextLine();

        Date startDate = parseDate(startDateStr);
        Date dueDate = parseDate(dueDateStr);

        Account account;
        if (choice == 1) {
            account = new CurrentAccount(name, number, balance, startDate);
        } else {
            account = new SavingsAccount(name, number, balance, startDate);
        }

        double interest = account.calculateInterest(dueDate);
        String accountType = (choice == 1) ? "Current" : "Savings";
        System.out.printf("%s Account Interest %.2f%n", accountType, interest);
    }

    private static int monthsDifference(Date startDate, Date endDate) {
        Calendar c1 = new GregorianCalendar();
        c1.setTime(startDate);

        Calendar c2 = new GregorianCalendar();
        c2.setTime(endDate);

        int ans = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12;
        ans += c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);

        return ans;
    }

    private static Date parseDate(String dateString) {
        try {
            return new SimpleDateFormat("yyyy-MM-dd").parse(dateString);
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }
}
//accout.java
import java.util.* ;
   public abstract class Account {
    String name;
    int number;
    int balance;
    Date startDate;

    Account(String name, int number, int balance, Date startDate) {
        this.name = name;
        this.number = number;
        this.balance = balance;
        this.startDate = startDate;
    }

    abstract double calculateInterest(Date dueDate);
    protected static int monthsDifference(Date startDate, Date endDate) {
        Calendar c1 = new GregorianCalendar();
        c1.setTime(startDate);

        Calendar c2 = new GregorianCalendar();
        c2.setTime(endDate);

        int ans = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12;
        ans += c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);

        return ans;
    }
  
}
//currentaccount.java
import java.util.*;
public class CurrentAccount extends Account {
    CurrentAccount(String name, int number, int balance, Date startDate) {
        super(name, number, balance, startDate);
    }

    
    double calculateInterest(Date dueDate) {
        int months = monthsDifference(startDate, dueDate);
        double rate = 5.0 / 12 / 100; 
        return balance * rate * months;
    }
      
}   
//savingsaccount.java
import java.util.*;
   public class SavingsAccount extends Account {
    SavingsAccount(String name, int number, int balance, Date startDate) {
        super(name, number, balance, startDate);
    }


    double calculateInterest(Date dueDate) {
        int months = monthsDifference(startDate, dueDate);
        double rate = 12.0 / 12 / 100; 
        return balance * rate * months;
    }
      
}


2..
//icici.java
class Icici implements Notification {
    //Fill your code here
     public void notificationBySms() {
        System.out.println("ICICI - Notification By SMS");
    }

    
    public void notificationByEmail() {
        System.out.println("ICICI - Notification By Mail");
    }


    public void notificationByCourier() {
        System.out.println("ICICI - Notification By Courier");
    }
}

//bankfactory.java
class BankFactory {
    //Fill your code here
    public Icici getIcici() {
        return new Icici();
    }

    public Hdfc getHdfc() {
        return new Hdfc();
    }
}
//notification.java
interface Notification {
   //Fill your code here
    void notificationBySms();
    void notificationByEmail();
    void notificationByCourier();
}
//main.java
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Welcome to Notification Setup");
        System.out.println("Please select your bank:");
        System.out.println("1) ICICI");
        System.out.println("2) HDFC");
        
        int bankChoice = scanner.nextInt();
        if (bankChoice == 1 || bankChoice == 2) {
            System.out.println("Enter the type of Notification you want to enter");
            System.out.println("1) SMS");
            System.out.println("2) Mail");
            System.out.println("3) Courier");
            
            int notificationChoice = scanner.nextInt();
            
            BankFactory bankFactory = new BankFactory();
            if (bankChoice == 1) {
                Icici icici = bankFactory.getIcici();
                switch (notificationChoice) {
                    case 1:
                        icici.notificationBySms();
                        break;
                    case 2:
                        icici.notificationByEmail();
                        break;
                    case 3:
                        icici.notificationByCourier();
                        break;
                    default:
                        System.out.println("Invalid Input");
                }
            } else {
                Hdfc hdfc = bankFactory.getHdfc();
                switch (notificationChoice) {
                    case 1:
                        hdfc.notificationBySms();
                        break;
                    case 2:
                        hdfc.notificationByEmail();
                        break;
                    case 3:
                        hdfc.notificationByCourier();
                        break;
                    default:
                        System.out.println("Invalid Input");
                }
            }
        } else {
            System.out.println("Invalid Input");
        }
    }
}
//hdfc.java
class Hdfc implements Notification {
    //Fill your code here
     public void notificationBySms() {
        System.out.println("HDFC - Notification By SMS");
    }

    
    public void notificationByEmail() {
        System.out.println("HDFC - Notification By Mail");
    }

    
    public void notificationByCourier() {
        System.out.println("HDFC - Notification By Courier");
    }
}