Question

Problem Description:

Problem Description:
(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 withdraw that withdraws a specified amount from the account.
A method named deposit that deposits a specified amount to the account.

Draw the UML diagram for the class. Implement the class. Write a test program that creates an Account object with an account ID of 1122, a balance of $20,000, and an annual interest rate of 4.5%. Use the withdraw method to withdraw $2,500, use the deposit method to deposit $3,000, and print the balance, the monthly interest, and the date when this account was created.

Analysis:
(Describe the problem including input and output in your own words.)

Design:
(Draw an UML class diagram for the Account class.)

Coding: (Copy and Paste Source Code here. Format your code using Courier 10pts)

public class Test {
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 {

// Implement the class here

}

Testing: (Describe how you test this program)

Answer 1

import java.util.Date;

public class Test {
        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, annualInterestRate;
        private Date dateCreated;
        
        public Account(int id, double balance) {
                this.id = id;
                this.balance = balance;
                dateCreated = new Date();
        }
        
        public Account() {
                this(0, 0);
        }
        
        public int getId() {
                return id;
        }

        public void setId(int id) {
                this.id = id;
        }

        public double getAnnualInterestRate() {
                return annualInterestRate;
        }

        public void setBalance(double balance) {
                this.balance = balance;
        }

        public String getDateCreated() {
                return dateCreated.toString();
        }
        
        public double getMonthlyInterest() {
                return balance * annualInterestRate / 1200.0;
        }
        public double getBalance() {
                return balance;
        }
        
        public void deposit(double a) {
                balance += a;
        }
        public void withdraw(double i) {
                if(balance >= i) {
                        balance -= i;
                }
        }
        
        public void setAnnualInterestRate(double d) {
                annualInterestRate = d;         
        }
        
        
}

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