public class Database_EMoney_Mandiri
{
    private static Account[] accounts;
 
    public Database_EMoney_Mandiri()
    {
        accounts = new Account[ 2 ];
        accounts[ 0 ] = new Account( 51030, 12345, 10000.0);
        accounts[ 1 ] = new Account( 51140, 54321, 100000.0 );
    }
 
    public static Account getAccount( int accountNumber )
    {
        for ( Account currentAccount : accounts )
        {
            if ( currentAccount.getAccountNumber() == accountNumber )
            return currentAccount;
        }
        return null;
    }
 
    public boolean authenticateUser( int userAccountNumber, int userPIN )
    {
        Account userAccount = getAccount( userAccountNumber );
        if ( userAccount != null )
        return userAccount.validatePIN( userPIN );
        else
        return false;
    }
 
    public static double getSaldo( int userAccountNumber )
    {
        return getAccount( userAccountNumber ).getSaldo();
    }
 
    public static void beli( int userAccountNumber, double amount )
    {
        getAccount( userAccountNumber ).beli( amount );
    }
}