Question

NOTE: Use the Account class codes in the section below these questions.

1. Modify the main method in the CheckingAccountDemo class:
   1. Take out all previous code.
   2. Declare an object array with 10 accounts.
   3. Create a for loop to ask user to input each account’s information (name, account number, and initial balance) from keyboard and then initialize for each account object.
   4. Create a while loop to allow one to work on depositing and withdrawing operations on any account till one want to exit.
      1. To work on an account, the user needs to input the owner name of the account. Then you write code to search the account object array to find the object that has the right owner name (Bonus: if you write the account searching part as a static method and simply call this method).
      2. If an account is found, ask user to choose withdrawing or depositing operation and also indicate the amount. Then perform the corresponding operation on the selected account.
   5. Outside of the while loop for the account operations, write a for loop to print the summary for each account

CheckingAccountDemo.java import java.util.*; public class CheckingAccountDemo {      public static void main(String[] args)      {           double balance;           String ownerName;           int accountNumber; Scanner input = new Scanner(System.in); System.out.println("Enter the name of owner of account: "); ownerName = input.nextLine(); System.out.println("Enter the account Number: "); accountNumber = input.nextInt(); System.out.println("Enter the account balance: "); balance = input.nextDouble(); CheckingAccount object1 = new CheckingAccount(accountNumber,ownerName,balance); //calling displayAccount method object1.displayAccount(); System.out.println("Enter amount to be Deposit:"); double deposit_amount=input.nextDouble(); //calling deposit account object1.depositAmount(deposit_amount); object1.displayAccount(); System.out.println("Enter amount to be Withdraw:"); double withdraw_amount=input.nextDouble(); //calling withdrawAmount method if(object1.withdrawAmount(withdraw_amount)){ System.out.println("Amount withdrawn successfully"); } else      {           System.out.println("Please check enter amount with current balance");      }      object1.displayAccount();      } }

CheckingAccount.java public class CheckingAccount { private int AccNumber; private String Owner; private double Balance; CheckingAccount(int AccNumber, String Owner, double Balance) { if(Balance<0) { System.err.println("Error. The Balance can't be negative"); this.Balance = 0.0; } else this.Balance = Balance; this.AccNumber = AccNumber; this.Owner = Owner; } // setter functions void setAccNumber(int AccNumber) { this.AccNumber = AccNumber; } void setOwner(String Owner) { this.Owner = Owner; } void setBalance(double Balance) { if(Balance<0) { System.err.println("Error. The Balance can't be negative"); this.Balance = 0.0; } else this.Balance = Balance; } //getter functions int getAccNumber() { return this.AccNumber; } String getOwner() { return this.Owner; } double getBalance() { return this.Balance; } //method for display account details void displayAccount(){ System.out.println("Name : "+getOwner()); System.out.println("Account number : "+ getAccNumber()); System.out.println("Available balance : "+getBalance()); } //method for deposit void depositAmount(double value){ if(value<0){ System.out.println("Amount should be positive"); } else{ this.Balance+=value; } } //method for withdraw boolean withdrawAmount(double value)      { if(value<0 || this.Balance<value)      { return false;      }      else           {               this.Balance-=value;      return true;           }      } }

Answer 1

in our CheckingAccountDemo class:

first we create an array AccountArray for storing 10 accounts

then we ask user to enter details of 10 account and add them to array

then we create an infinite while loop that only terminates when user enters exit

inside the loop we ask the user to enter account owner name or enter exit to quit

if the user enters a account owner name we search the array AccountArray for the account.

if account is not found we display account not found

else we ask user to deposit or withdraw money and perform deposit or withdrawal according to users choice

outside the while loop we display the details off all the accounts in array using for loop.

CheckingAccountDemo.java:

import java.util.Scanner;

public class CheckingAccountDemo {
    public static void main(String[] args)

    {
        //array for storing 10 accounts
        CheckingAccount[] AccountArray = new CheckingAccount[10];

        Scanner input = new Scanner(System.in);

        //variables
        double balance;

        String ownerName;

        int accountNumber;

        System.out.println("Enter 10 account details");

        //asking user for 10 account details,creating each account and adding it to array
        for (int i = 0; i < 10; i++) {
            System.out.println("Enter the name of owner of account: ");

            ownerName = input.nextLine();

            System.out.println("Enter the account Number: ");

            accountNumber = Integer.parseInt(input.nextLine());

            System.out.println("Enter the account balance: ");

            balance = Double.parseDouble(input.nextLine());

            AccountArray[i] = new CheckingAccount(accountNumber, ownerName, balance);


        }

        String name;

        //infinite loop that only terminates when user enters exit
        while (true) {
            //asking user to enter account owner name or exit
            System.out.println("Enter account owner name or enter exit to quit: ");
            name = input.nextLine();

            if (name.equals("exit")) { //if user enters exit we break the loop
                break;
            } else {
                CheckingAccount account = searchAccount(AccountArray, name); //calling function to search account in array

                //if account not found
                if (account == null) {
                    System.out.println("Account not found");
                } else {
                        //asking user to enter 0 to withdraw money and 1 to deposit money
                        System.out.println("Enter 1 to deposit or 0 to withdraw: ");
                        int choice = Integer.parseInt(input.nextLine());

                        if (choice == 1) {//if user enters 1
                            account.displayAccount();

                            System.out.println("Enter amount to be Deposit:");

                            double deposit_amount = Double.parseDouble(input.nextLine());
                            account.depositAmount(deposit_amount);

                            account.displayAccount();
                        } else {
                            account.displayAccount();
                            System.out.println("Enter amount to be Withdraw:");

                            double withdraw_amount = Double.parseDouble(input.nextLine());

//calling withdrawAmount method

                            if (account.withdrawAmount(withdraw_amount)) {

                                System.out.println("Amount withdrawn successfully");

                            } else

                            {

                                System.out.println("Please check enter amount with current balance");

                            }

                            account.displayAccount();
                        }
                    }
                }
            }
            // displaying details of all accounts in the array
            for (int i=0;i<10;i++){
                AccountArray[i].displayAccount();
                System.out.println();
            }


        }
    //function for searchiong account in array
    private static CheckingAccount searchAccount(CheckingAccount[] accountArray, String name) {
        for (int i = 0; i < 10; i++) {
            if (accountArray[i].getOwner().equals(name)) {
                return accountArray[i];
            }
        }
        return null;
    }
}