(Subclasses of Account) In Programming Exercise, the Account class...

(Subclasses of Account) In Programming Exercise, the Account class was defined to model a bank account. An account has the properties account number, balance, annual interest rate, and date created, and methods to deposit and withdraw funds. Create two subclasses for checking and saving accounts. A checking account has an overdraft limit, but a savings account cannot be overdrawn.

Programming Exercise

(The Account class) Design a class named Account that contains:
■ A private int data field named id for the account (default 0).
■ A private double data field named balance for the account (default 0).
■ A private double data field named annualInterestRate that stores the current interest rate (default 0).
Assume all accounts have the same interest rate.
■ A private Date data field named dateCreated that stores the date when the account was created.
■ A no-arg constructor that creates a default account.
■ A constructor that creates an account with the specified id and initial balance.
■ The accessor and mutator methods for id, balance, and annualInterestRate.
■ The accessor method for dateCreated.
■ A method named getMonthlyInterestRate() that returns the monthly interest rate.
■ A method named getMonthlyInterest() that returns the monthly interest.
■ A method named withdraw that withdraws a specified amount from the account.
■ A method named deposit that deposits a specified amount to the account.

Solution:

public class Exercise09_07 {
public static void main (String[] args) {
Account account = new Account(1122, 20000);
Account.setAnnualInterestRate(4.5);
account.withdraw(2500);
account.deposit(3000);
System.out.println("Balance is " + account.getBalance());
System.out.println("Monthly interest is " +
account.getMonthlyInterest());
System.out.println("This account was created at " +
account.getDateCreated());
}
}

class Account {
private int id;
private double balance;
private static double annualInterestRate;
private java.util.Date dateCreated;

public Account() {
dateCreated = new java.util.Date();
}
public Account(int newId, double newBalance) {
id = newId;
balance = newBalance;
dateCreated = new java.util.Date();
}
public int getId() {
return this.id;
}
public double getBalance() {
return balance;
}
public static double getAnnualInterestRate() {
return annualInterestRate;
}
public void setId(int newId) {
id = newId;
}
public void setBalance(double newBalance) {
balance = newBalance;
}
public static void setAnnualInterestRate(double newAnnualInterestRate) {
annualInterestRate = newAnnualInterestRate;
}
public double getMonthlyInterest() {
return balance * (annualInterestRate / 1200);
}
public java.util.Date getDateCreated() {
return dateCreated;
}
public void withdraw(double amount) {
balance -= amount;
}
public void deposit(double amount) {
balance += amount;
}
}