public class Account_Database
{
    // instance variables - replace the example below with your own
    private Account accounts[];
    public Account_Database()
    {
        accounts = new Account[6];
        accounts[0] = new Account(13579,1000000);
        accounts[1] = new Account(24680, 400000);
        accounts[2] = new Account(16124, 100000);
        accounts[3] = new Account(16001, 50000);
        accounts[4] = new Account(16002, 10000);
        accounts[5] = new Account(10001, 9999);
    }
    public Account getAccount(int AccountNumber)
    {
        for(Account currentAccount : accounts)
        {
            if ( currentAccount.getAccountNumber() == AccountNumber ) return currentAccount;
        }
        return null;
    }
    public boolean authenticateUser(int UserAccount)
    {
        Account userAccount = getAccount(UserAccount);
        if(userAccount == null)
        return false;
        return true;
    }
    public int getAccountBalance(Account useraccount)
    {
        return useraccount.getBalance();
    }
    public void tollpay(Account useraccount, int amount)
    {
        useraccount.pay(amount);
    }
}