Question

2. Write a class called ATMTransaction. This class has a variable balance and
account number.
It has three methods, checkBalance, deposit and withdraw along with constructors
getters and setters and a toString. Write a program that
creates an object of this class. I should be able to deposit and withdraw from
my account number based on my balance , but i shouldnt be able to change my
account number. Look for loopholes in your program, test it correctly, your
balance cannot be negative.

2. Write a class called ATMTransaction. This class has a variable balance and account number It has three methods, checkBalance, deposit and withdraw along with constructors getters and setters and a toString. Write a program that creates an object of this class. I should be able to deposit and withdraw from my account number based on my balance, but i shouldnt be able to change my account number. Look for loopholes in your program, test it correctly, your balance cannot be negative.

Answer 1

class ATMTransaction {
   private int accountNumber;
   private double balance;

   public ATMTransaction(int aAccountNumber, double aBalance) {
       super();
       accountNumber = aAccountNumber;
       balance = aBalance;
   }

   public ATMTransaction(int aAccountNumber) {
       super();
       accountNumber = aAccountNumber;
   }

   public double checkBalance() {
       return balance;
   }

   public void deposit(double am) {
       balance += am;
   }

   public void withdraw(double am) {
       if (balance >= am) {
           balance -= am;
       } else {
           System.out.println("Low balance..can not withdraw");
       }
   }

   public double getBalance() {
       return balance;
   }

   public int getAccountNumber() {
       return accountNumber;
   }

   @Override
   public String toString() {
       return "AccountNumber : " + accountNumber + ", Balance=" + balance;
   }

  
}

public class TestATMTransaction {
   public static void main(String[] args) {
       ATMTransaction atm = new ATMTransaction(123, 500);
       atm.deposit(100);
       System.out.println("Balance : " + atm.checkBalance());
       atm.deposit(200);
       System.out.println("Balance : " + atm.checkBalance());
       atm.withdraw(500);
       System.out.println("Balance : " + atm.checkBalance());
       atm.withdraw(500);
       System.out.println("Balance : " + atm.checkBalance());
       System.out.println(atm);
   }
}

«terminated> TestATMTransaction [Java Application] C:\SoftPegaEclipse-win64-4.5.2.29 Balance: 600.0 Balance : 800.0 Balance 300.0 Low balance Balance 300.0 AccountNumber 123, Balance-300.0