Modify the Account class from Chapter 4 so that it also permits an account to be opened with just a name and an account number, assuming an initial balance of zero. Modify the main method of the Transactions class to demonstrate this new capability.

Account Class

Transactions Class

//******************************************************************** // Account.java Author: Lewis/Loftus // // Represents a bank account with basic services such as deposit // and withdraw. //******************************************************************** import java.text.NumberFormat; public class Account { private final double RATE = 0.035; // interest rate of 3.5% private long acctNumber; private double balance; private String name; //----------------------------------------------------------------- // Sets up the account by defining its owner, account number, // and initial balance. //----------------------------------------------------------------- public Account (String owner, long account, double initial) { name = owner; acctNumber = account; balance = initial; } //----------------------------------------------------------------- // Deposits the specified amount into the account. Returns the // new balance. //----------------------------------------------------------------- public double deposit (double amount) { balance = balance + amount; return balance; } //----------------------------------------------------------------- // Withdraws the specified amount from the account and applies // the fee. Returns the new balance. //----------------------------------------------------------------- public double withdraw (double amount, double fee) { balance = balance - amount - fee; return balance; } //----------------------------------------------------------------- // Adds interest to the account and returns the new balance. //----------------------------------------------------------------- public double addInterest () { balance += (balance * RATE); return balance; } //----------------------------------------------------------------- // Returns the current balance of the account. //----------------------------------------------------------------- public double getBalance () { return balance; } //----------------------------------------------------------------- // Returns a one-line description of the account as a string. //----------------------------------------------------------------- public String toString () { NumberFormat fmt = NumberFormat.getCurrencyInstance(); return (acctNumber + "\t" + name + "\t" + fmt.format(balance)); } }

//******************************************************************** // Transactions.java Author: Lewis/Loftus // // Demonstrates the creation and use of multiple Account objects. //******************************************************************** public class Transactions { //----------------------------------------------------------------- // Creates some bank accounts and requests various services. //----------------------------------------------------------------- public static void main (String[] args) { Account acct1 = new Account ("Ted Murphy", 72354, 102.56); Account acct2 = new Account ("Jane Smith", 69713, 40.00); Account acct3 = new Account ("Edward Demsey", 93757, 759.32); acct1.deposit (25.85); double smithBalance = acct2.deposit (500.00); System.out.println ("Smith balance after deposit: " + smithBalance); System.out.println ("Smith balance after withdrawal: " + acct2.withdraw (430.75, 1.50)); acct1.addInterest(); acct2.addInterest(); acct3.addInterest(); System.out.println (); System.out.println (acct1); System.out.println (acct2); System.out.println (acct3); } }