2 Inheritance

abstract class BankAccount {
    private String accNumber;
    private String accHolderName;
    private double balance;


    public String getAccNumber() {
        return accNumber;
    }
    public void setAccNumber(String accNumber) {
        this.accNumber = accNumber;
    }
    public String getAccHolderName() {
        return accHolderName;
    }
    public void setAccHolderName(String accHolderName) {
        this.accHolderName = accHolderName;
    }
    public double getBalance() {
        return balance;
    }
    public void setBalance(double balance) {
        this.balance = balance;
    }
    abstract void deposit(double amount);
    abstract void withdraw(double amount);


    public void displayAccountDetails() {
        System.out.println("Account number: " + accNumber);
        System.out.println("Account holder name: " + accHolderName);
        System.out.println("Account balance: " + balance);
    }
}


class SavingsAccount extends BankAccount {
    private double interestRate;


    public double getInterestRate() {
        return interestRate;
    }
    public void setInterestRate(double interestRate) {
        this.interestRate = interestRate;
    }
    public void deposit(double amount) {
        if (amount < 0) {
            System.out.println("Can't deposit money");
        }
        else {
            setBalance(getBalance() + amount);
        }
    }
    public void withdraw(double amount) {
        if (amount > getBalance()) {
            System.out.println("Insufficient balance");
        }
        else {
            setBalance(getBalance() - amount);
        }
    }
    public void calculateYearlyInterest() {
        double interest = getBalance() * (interestRate / 100);
        System.out.println("Interest rate per year: " + interest);
    }
}


class FixedDeposit extends SavingsAccount {
    private int termInYears;


    public FixedDeposit(int termInYears, double balance, double interestRate) {
        this.termInYears = termInYears;
        setBalance(balance);
        setInterestRate(interestRate);
    }


    public void calculateMaturityAmount() {
        double maturity = getBalance() * (Math.pow(1 + (getInterestRate() / 100) , termInYears));
        System.out.println("Maturity amount: " + maturity);
    }
}


import java.util.Scanner;


public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        SavingsAccount SavingsAccount = new SavingsAccount();


        System.out.print("Enter account number: ");
        String accNum = scanner.nextLine();
        SavingsAccount.setAccNumber(accNum);


        System.out.print("enter account holder name: ");
        String accHolName = scanner.nextLine();
        SavingsAccount.setAccHolderName(accHolName);


        System.out.print("Enter interest rate: ");
        double intRate = scanner.nextDouble();
        SavingsAccount.setInterestRate(intRate);


        while (true) {
            System.out.println();
            System.out.print("1 for deposit.");
            System.out.print("\n2 for withdraw.");
            System.out.print("\n3 for account details.");
            System.out.print("\n4 for yearly interest rate.");
            System.out.print("\n5 for fixed deposit.");
            System.out.print("\n6 for exit.");
            System.out.println();


            System.out.print("\nEnter your choice: ");
            int choice = scanner.nextInt();


            switch (choice) {
                case 1:
                    System.out.print("Enter deposit amount: ");
                    double deposit = scanner.nextDouble();
                    SavingsAccount.deposit(deposit);
                    break;
 
                case 2:
                    System.out.print("Enter withdrawl amount: ");
                    double withdraw = scanner.nextDouble();
                    SavingsAccount.withdraw(withdraw);
                    break;
               
                case 3:
                    SavingsAccount.displayAccountDetails();
                    break;
               
                case 4:
                    SavingsAccount.calculateYearlyInterest();
                    break;
               
                case 5:
                    System.out.print("Enter fixed deposit year: ");
                    int year = scanner.nextInt();
                    System.out.print("Enter amount for fixed deposit: ");
                    double fixamn = scanner.nextDouble();
                    System.out.print("Enter interest rate for fixed deposit: ");
                    double fixInt = scanner.nextDouble();


                    FixedDeposit fixedDeposit = new FixedDeposit(year, fixamn, fixInt);
                    fixedDeposit.calculateMaturityAmount();
                    break;


                case 6:
                    System.out.print("\nExiting the program");
                    scanner.close();
                    return;


                default:
                    System.out.println("Invalid choice.");
            }  
        }
    }
}