Question

Write a program to create a bank account and to process transactions. Call this class bankAccount

• A bank account can only be given an initial balance when it is instantiated. By default, a new bank account should have a balance of 0.
• A bank account should have a public get method, but no public set method.
• A bank account should have a process method with a double parameter to perform deposits and withdrawals. A negative parameter represents a withdrawal. It should not be possible to withdraw more than the current balance.
• A bank account should print method so that it can be printed easily. It should print as "The current balance is $___", with the correct value in the blank.
• write toString() method
• Write a driver program name it runAccount to input an amount from the user and instantiate a bank account with that initial balance, then input transactions until the user chooses to quit, printing the bank account after each transaction.
• Write a default constructor that initializes account balance zero

Answer 1

Driver program

​

import java.util.ArrayList;
import java.util.Scanner;

public class runAccount {

        public static void main(String[] args) {
                

                String str = "";
                int choice;
                double balance;
                double initialAmount;
                int wish;
                int index = -1;
                double depositAmount;
                double withdrawAmount;
                ArrayList<bankAccount> b = new ArrayList<>();
                
                Scanner sc = new Scanner(System.in);
                System.out.println("welcome!");
                while(str != "q")
                {
                        System.out.println("Choose the option below!");
                        System.out.println("1.Create a new Account!");
                        System.out.println("2.Deposit money");
                        System.out.println("3.Withdraw money");
                        System.out.println("4.Show balance");
                        
                        do{
                                System.out.println("Enter your choice between 1 and 4");
                            choice = sc.nextInt();
                        }while(choice < 1 || choice > 4);
                        
                        if(choice == 1)
                        {
                                System.out.println("Creating a new Account...");
                                System.out.println("want to give an initial amount? 1 = yes ; 0 = no ");
                                wish = sc.nextInt();
                                if(wish == 1)
                                {
                                        System.out.println("Enter your amount.");
                                        initialAmount = sc.nextDouble();
                                        index++;
                                    b.add(new bankAccount(initialAmount));
                                    
                                }else
                                {
                                        b.add(new bankAccount());
                                }
                        }
                        System.out.println("Your Account has been created!");
                        b.get(index).printBal();
                        
                        if(choice == 2)
                        {
                                System.out.println("Enter the money to deposit");
                                depositAmount = sc.nextDouble();
                                b.get(index).withdraw(depositAmount);
                                b.get(index).printBal();
                        }
                        
                        if(choice == 3)
                        {
                                System.out.println("Enter the money to withdraw");
                                withdrawAmount = sc.nextDouble();
                            b.get(index).withdraw(withdrawAmount);
                            b.get(index).printBal();
                        }
                        
                        if(choice == 4)
                        {
                                b.get(index).printBal();
                        }
                        System.out.println("press 'q' to quit");
                        str = sc.next();
                }
        }

}

​

bankAccount class:

public class bankAccount {

        private double balance;
        public bankAccount()
        {
                balance = 0;
        }
        
        public bankAccount(double bal)
        {
                balance = bal;
        }
        
        private void setBal(double bal)
        {
                balance = bal;
        }
        
        public double getBal()
        {
                return balance;
        }
        
        public void deposit(double bal)
        {
                balance = balance + bal;
        }
        
        public void withdraw(double bal)
        {
                balance = balance - bal;
        }
        
        public void printBal()
        {
                System.out.println("The current balance is $" + balance);
        }
}