Question

Class 1: Account.java

Variables:

1. accountNumber (public)

2. accountName (public)

3. balance (private)

In Account.java

Functions:

1. Fully parametrized Constructor (to initialize class variables)

2. Getter (getBalance()) and Setter (setBalance()) for the float balance, must be greater than zero.

In Account.java

Methods:

1. checkBalance( ) to print CURRENT BALANCE.
2. deposit(int added_amount) should add add_amount to balance
3. withdraw(int withdraw_amount) should deduct withdraw_amount balance
4. display( ) will print all the information (account number, name, balance).

Class 2: AccountTest.java

1. Create an object account1 and pass variables in argument of Account function (which is a constructor)

Ask user to input values off accountNo, accountName and balance.

2. In main class first call the display method. And then call checkBalance() method. After that deposit 40,000 in bank account and again display the balance. Now withdraw 12000 and display the balance.

Answer 1

Below is your code:

Account.java

public class Account {
        public int accountNumber;
        public String accountName;
        private float balance;

        // 1. Fully parametrized Constructor (to initialize class variables)
        public Account(int accountNumber, String accountName, float balance) {
                this.accountNumber = accountNumber;
                this.accountName = accountName;
                this.balance = balance;
        }

        // 2. Getter (getBalance()) and Setter (setBalance()) for the float balance,
        // must be greater than zero.

        public float getBalance() {
                return balance;
        }

        public void setBalance(float balance) {
                if (balance > 0)
                        this.balance = balance;
        }

        // checkBalance( ) to print CURRENT BALANCE.
        public void checkBalance() {
                System.out.println("Current Balance: " + this.balance);
        }

        // deposit(int added_amount) should add add_amount to balance
        public void deposit(int added_amount) {
                this.balance = this.balance + added_amount;
        }

        // withdraw(int withdraw_amount) should deduct withdraw_amount balance
        public void withdraw(int withdraw_amount) {
                this.balance = this.balance - withdraw_amount;
        }

        // display( ) will print all the information (account number, name,
        // balance).
        public void display() {
                System.out.println("Account number: " + accountNumber
                                + ", Account Name: " + accountName + ", Balance: "
                                + this.balance);
        }

}

AccountTest.java

import java.util.Scanner;

public class AccountTest {
        public static void main(String[] args) {
                int accountNo;
                String accountName;
                float balance;
                Scanner sc = new Scanner(System.in);
                System.out.print("Enter Account Number: ");
                accountNo = Integer.parseInt(sc.nextLine());
                System.out.print("Enter Account Name: ");
                accountName = sc.nextLine();
                System.out.print("Enter Balance: ");
                balance = Float.parseFloat(sc.nextLine());
                Account account1 = new Account(accountNo, accountName, balance);
                account1.display();
                account1.checkBalance();
                account1.deposit(40000);
                account1.checkBalance();
                account1.withdraw(12000);
                account1.checkBalance();
        }
}

Output

Enter Account Number: 123465879
Enter Account Name: Mark's Inventories
Enter Balance: 100000
Account number: 123465879, Account Name: Mark's Inventories, Balance: 100000.0
Current Balance: 100000.0
Current Balance: 140000.0
Current Balance: 128000.0