7.2 LAB: Bank accounts (implementing a class hierarchy)

For this lab problem, you will be implementing a class hierarchy to represent bank accounts. Your hierarchy will consist of a class BankAccount and two subclasses of BankAccount: SavingsAccount and CheckingAccount.

Task 1: Create class BankAccount

• Create a class BankAccount.
  • Its constructor should take in as parameters a persons name and a balance, stored as a double.
• Implement methods getName and getBalance
• Implement deposit and withdraw methods to add and subtract a specified amount from the balance.
• Furthermore, implement a transfer method, that takes another BankAccount instance and a specified amount, and transfers that amount from the original BankAccount to the one that is given.
• Finally, override the toString method to return a string containing the name and balance of the account.

Example output for toString:

BankAccount account = new BackAccount("Shrek", 5.0); System.out.println(accout.toString()); 

Should output

Shrek, $5.00 

Task 2: Create derived class SavingsAccount

• Create another class named SavingsAccount.
  • This should be a subclass of BankAccount.
• Implement a constructor for SavingsAccount that takes in an interest rate in addition to the name and balance. Example SavingsAccount constructor call with a balance of $200.00 and a 5% interest rate:

SavingsAccount savings = new SavingsAccount(Fiona, 200.0, 5.0); 

• Finally, implement a method, addInterest, that deposits interest into account, based on the account balance and interest rate.

Task 3: Create derived class CheckingAccount

• Create another subclass of BankAccount named CheckingAccount.
• Create a field `transactionCount which keeps track of the number of transactions made (deposits and withdrawals).
• Create a static final field, TRANSACTION_FEE, and initialize it to 3.0.
  • This checkings account charges a fee of $3.00 for every single transactino
• Finally, create a method, deductFees, that deducts fees from the account balance based on the number of transactions.
  • This method should reset the transactionCount to zero.

Task 4

Finish implementing BankAccountTest as follows.

• Construct a SavingsAccount from savings parameters read from input.
• Construct a CheckingAccount from checkings parameters read from input.
• Deposit $1000 into the SavingsAccount.
• Withdraw $100 from the CheckingAccount.
• Now transfer $200 from the SavingsAccount into the CheckingAccount.
• Deduct the fees from the CheckingAccount.
• Add the interest to the SavingsAccount.
• Print out the SavingsAccount.
• Print out the CheckingAccount

Input:

Satoshi 8800000000.0 1.0 Maus 1000.0 

Output:

Satoshi, $8888000808.00 Maus, $1094.00

GIVEN CODE

public class BankAccount {

/* Implement class BankAccount here. */

}

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/* Define class CheckingAccount here */

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/* Define class SavingsAccount here. */

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import java.util.Scanner;

public class BankAccountTest { public static void main(String[] args) { Scanner scn = new Scanner(System.in); // Read in Savings Parameters String savingsName = scn.next(); double savingsBalance = scn.nextDouble(); double savingsInterest = scn.nextDouble(); // Read in Checkings Parameters String checkingsName = scn.next(); double checkingsBalance = scn.nextDouble(); /* Type your code here. */ } }