Question

using BlueJ “jave program” please

Exercise P3.1. Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000, withdraws $500, withdraws another $400, and then prints the remaining balance. Also print the expected result.

Answer 1

import java.util.Scanner;

class BankAccount {

   private double balance;
   // deposits the amount to the bank
   public void deposit(double aBalance) {

       balance += aBalance;

   }
   // withdraws amount from the bank
   public void withdraw(double aAmount) {

       //checking if amount is valid
       if (aAmount <= balance && aAmount > 0) {

           balance -= aAmount;

       } else {

           System.out.println("Not valid amount");

       }

   }
   public double get() {

       return balance;

   }

}

public class BankAccountTester {

   public static void main(String[] args) {

       int ch = 0;

       double amount = 0;

       BankAccount b = new BankAccount();

       Scanner sc = new Scanner(System.in);

       do {
           // displaying menu to user
           System.out.println("-----------");
           System.out.println("1 Deposit");

           System.out.println("2 Withdraw");

           System.out.println("3 Print");

           System.out.println("4 Quit");
           System.out.println("-----------");
           System.out.println("Your choice: ");
           //reading user choic
           ch = sc.nextInt();

           switch (ch) {

           case 1:
               //reading amount
               System.out.println("Amount");

               amount = sc.nextDouble();
               //calling deposit

               b.deposit(amount);

               break;

           case 2:
               //reading amount

               System.out.println("Amount");
               //calling withdraw

               amount = sc.nextDouble();

               b.withdraw(amount);

               break;

           case 3:

               System.out.println("Your balance : " + b.get());

               break;

           case 4:
               ch=10;

               break;

           }

       } while (ch <4);
       System.out.println("Thank you");

   }

}

Your choice: 1 Amount 1000 1 Deposit 2 Withdraw 3 Print 4 Quit Your choice: 2 Amount 500 1 Deposit 2 Withdraw 3 Print 4 Quit Your choice: 2 Amount 400 1 Deposit 2 Withdraw 3 Print 4 Quit Your choice Your balance : 100.0

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