Question

JAVA

A simple Class in a file called Account.java is given below. Create two Derived Classes Savings and Checking within their respective .java files. (modify display() as needed )

1. Add New private String name (customer name) for both, add a New int taxID for Savings only.

2. Add equals() METHOD TO CHECK any 2 accounts

Demonstrate with AccountDemo.java in which you do the following:

3. Create 1 Savings Account and 3 Checking Accounts, where 2 checkings are the same. Check 2 equal accounts and 2 different accounts.

4. Withdraw 100 dollars from savings , deposit the same amount to a checking , then display accounts.

import java.util.*;

public class Account

{private int accNum; double balance;

public Account (int accNum, double balance)

{

this.accNum = accNum;

this.balance = balance;

}

public int getAccNum()

{

return accNum;

}

public double getBalance()

{

return balance;

}

public void deposit (double depositAmt)

{

double newBalance = balance + depositAmt;

}

public void withdraw (double withdrawAmt)

{…………….fill here………………….}

public void display()

{

System.out.println();

System.out.println("Account Number :" + accNum );

System.out.println("Balance :" + balance);

}

}

Answer 1

CODE:

package com.company;

import java.io.*;
import java.util.Objects;

class Account {
    private int accNum;
    double balance;
    //constructor
    public Account (int accNum, double balance) {
        this.accNum = accNum;
        this.balance = balance;
    }
    //getters and setters
    public int getAccNum() {
        return accNum;
    }

    public double getBalance() {
        return balance;
    }
    //deposit method
    public void deposit (double depositAmt) {
        double newBalance = balance + depositAmt;
        balance = newBalance;
    }
    //withdraw method
    public void withdraw (double withdrawAmt) {
        //withdrawal Amount will be deducted from the balance only
        //when it is less than equal to the balance
        if(withdrawAmt <= balance)
            balance -= withdrawAmt;
        else{
            System.out.println("Withdraw amount greater than the balance");
        }
    }
    //display method
    public void display() {
        System.out.println();
        System.out.println("Account Number :" + accNum );
        System.out.println("Balance :" + balance);
    }
}

class Savings extends Account{
    private String name;
    private int taxId;
    //constructor
    public Savings(String name,int taxId, int accNum, double balance) {
        super(accNum, balance);
        this.name = name;
        this.taxId = taxId;
    }

    @Override
    public boolean equals(Object o) {
        //if the object is equal to this then return true
        if (this == o)
            return true;
        //if the object is not an instance of Savings
        if (!(o instanceof Savings))
            return false;
        Savings savings = (Savings) o;
        //if all the parameters are same then returns true
        return taxId == savings.taxId && Objects.equals(name, savings.name)
                && getAccNum() == savings.getAccNum() && getBalance() == savings.getBalance();
    }

    @Override
    public void display() {
        super.display();
        System.out.println("Name: "+name);
        System.out.println("TaxId: "+taxId);
    }
}

class Checking extends Account{
    private String name;
    //constructor
    public Checking(String name, int accNum, double balance) {
        super(accNum, balance);
        this.name = name;
    }

    @Override
    public boolean equals(Object obj) {
        //if the object is equal to this then return true
        if (this == obj)
            return true;
        //if the object is not an instance of Checking
        if (!(obj instanceof Checking))
            return false;
        Checking checking = (Checking) obj;
        //if all the parameters are same then returns true
        return Objects.equals(name, checking.name)
                && getAccNum() == checking.getAccNum() && getBalance() == checking.getBalance();
    }
    //display method
    @Override
    public void display() {
        super.display();
        System.out.println("Name: "+name);
    }
}

//main driver class
class Main {
    //main method
    public static void main(String[] args) throws IOException {
        //1 savings account
        Savings savings = new Savings("John",124,1626,1352.7);
        //3 checking account
        Checking checking1 = new Checking("Harry",5156,363.2);
        Checking checking2 = new Checking("Matt",5176,3623.2);
        Checking checking3 = new Checking("Harry",5156,363.2);
        //printing the result of two equals call methods
        System.out.println(checking1.equals(checking3));
        System.out.println(checking1.equals(checking2));
        //withdrawing $100 from savings
        savings.withdraw(100);
        //depositing $100 to checking
        checking2.deposit(100);
        //displaying two accounts
        savings.display();
        checking2.display();
    }
}

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CODE IMAGES:

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OUTPUT:

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Feel free to ask any questions in the comments section

Thank You!