Chapter 3.4, Problem 15SC

Program Plan Intro

Given program:

BankAccount.java:

//Define the class "BankAccount"

public class BankAccount

{

    //Declare required variables

    private double balance;

    private int accountNumber;

    // Define a default constructor

    public BankAccount

    {

        //Initialize the balance amount

        balance=0;

    }

    // Define the parametrized constructor

    public BankAccount(double initialBalance)

    {

        //Initialize the balance amount

        balance=initialBalance;

    }

    //Give function definition to deposit amount

    public void deposit(double amount)

    {

        //Compute the balance

        balance=balance+amount;

    }

    //Give function definition to withdraw amount

    public void withdraw(double amount)

    {

        //Compute the balance

        balance=balance-amount;

    }

    /*Give function definition to return the

    balance amount*/

    public double getBalance()

    {

        //Return statement

        return balance;

    }

}

BankAccountTester.java:

//Define the class BankAccountTester

class BankAccountTester

{

      //Define the main method

    public static void main(String[] args)

    {

//Create an object for the BankAccount class and initialize it with the amount

        BankAccount account = new BankAccount(1000);

        //Withdraw 500 from the account

        account.withdraw(500);

        //Withdraw 400 from the account

        account.withdraw(400);

        //Print the expected result

System.out.println("Remaining balance in the account is: $"+account.getBalanceAmount());

    }

}

 Explanation:

BankAccount.java:

 In the above program,

• Define a class “BankAccount”.
  • Declare the variable “balance”.
  • Define a default constructor.
    • Initialize the balance amount.
  • Define a parameterized constructor.
    • Initialize the balance amount.
  • Give the function definition “deposit()” to withdraw amount from the account.
    • Compute the balance amount.
  • Give the function definition “withdraw()” to withdraw amount from the account.
    • Compute the balance amount
  • Give function definition to return the balance amount.
    • Return “balance”.

BankAccountTester.java:

In the above program,

• Define the class “BankAccountTester”.
• Define the method “main ()”.
  • Create an object for the “BankAccount” class and initialize the balance amount.
  • Withdraw 500 from the balance using “withdraw ()” method.
  • Again withdraw 400 from the balance using “withdraw ()” method.
  • Finally, print the expected result.