public class Bank {
    public static void main(String[] args) {
        SavingsAccount savings =
            new SavingsAccount(4321, 5028.45, 0.02);
        BonusSaverAccount bigSavings =
            new BonusSaverAccount (6543, 1475.85, 0.02);
        CheckingAccount checking =
            new CheckingAccount (9876,269.93, savings);
        savings.deposit(148.04);     System.out.println(); 
        bigSavings.deposit(41.52);   System.out.println(); 
        savings.withdraw(725.55);    System.out.println(); 
        bigSavings.withdraw(120.38); System.out.println(); 
        checking.withdraw(320.18);   System.out.println(); 
    } // end of main
} // end of class Bank