public class AccountDemo {
public static void main(String[] args) {
Account account = new Account();
System.out.println("帳戶: " + account.getAccountNumber());
System.out.println("餘額: " + account.getBalance());
account = new Account("123-4567", 100.0);
account.deposit(1000.0);
System.out.println("帳戶: " + account.getAccountNumber());
System.out.println("餘額: " + account.getBalance());
}
}