Question

When I update the balance of certain record in the array, using the deposit and withdraw amounts, the balance for that sepcific record changes along with the balance for the records in arrays.

How to fix it?

private String name;
private int pin;
private int account;
private static double balance;

---

public void setBalance(double amount)
{
    balance = amount;
}

public static void deposit(double aDeposit) 
{ 
balance = balance + aDeposit; 
} 
public static void withdraw(double aWithdraw) 
{ 
    if  
    ( balance >= aWithdraw) 
        balance = balance - aWithdraw; 
    else if 
    ( balance < aWithdraw) 
        System.out.println("Cannot withdarw amount."); 
}

public double getBalance( )
{
    return balance;
}
public boolean equal(CustomerRecord otherObject)
{
    return (name.equalsIgnoreCase(otherObject.name) &&
           (pin == otherObject.pin) &&
           (account == otherObject.account) &&
           (balance == otherObject.balance));

      }
  }

---

    do{   


        System.out.println("Enter the name");
        String aName;
        Scanner keyboard = new Scanner(System.in);
        aName = keyboard.nextLine();

        System.out.println("Enter the pin");
        int aPin;
        aPin = keyboard.nextInt();


             for

             (int i = 0; i < index; i++) {
              CustomerRecord record = anotherArray[i];
              if
              ((record.getName().equalsIgnoreCase(aName)) && (record.getPin() == (aPin)))

          {
                 System.out.println(record);

             System.out.println("Enter the amount you wish to Deposit");
             double aDeposit;
             aDeposit = keyboard.nextDouble();
             CustomerRecord.deposit(aDeposit);

             System.out.println("Enter the amount you wish to withdraw");
             double aWithdraw;
             aWithdraw = keyboard.nextDouble();
             CustomerRecord.withdraw(aWithdraw);


            record.getBalance();

  }
             }

        System.out.println("\nAnother Transaction? (y for yes) (n for no)");
        repeat = keyboard.next().charAt(0);

    }
    while
        (

         repeat == 'y' || repeat == 'Y') ;

        //Print the records on screen

    { for (int i = 0; i < index; i++)
        System.out.print(anotherArray[i]);
    }

Answer 1

You haven’t shown where you define the balance field but going by the fact that you are able to access it from a static methods deposit and withdraw I would guess it is itself a static variable, say

private static double balance;

Now, what does the static mean here? If you figure that out, you will know what is the error in your program, and why changing it in one object changes it in all