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[brian yuen]

Account class

 
import java.io.*;
public class Account
{
    private String accountNo;
    private double accBalance;
    public Account(String accountNo,  double accountBalance)
    {
        this.accountNo = accountNo;
        this.accBalance = accountBalance;
        printAccount();
    }
    public String getAccNum()
    {
        return accountNo;
    }
    public double getAccBalance()
    {
        return accBalance;
    }
    public void printAccount()
    {
        try
        {
            PrintWriter out = new PrintWriter(new FileOutputStream("Account.txt", true));
            String s = getAccNum() + "," + getAccBalance();
            out.println(s);
            out.close();
        }
        catch(FileNotFoundException e)
        {
            System.out.println("Account.txt does not exist");
        }
    }
}

checking class

  
public class Checking  extends Account
{
     public Checking(String accountNo, double accountBalance)
     {
         super(accountNo, accountBalance);
     }
}

Record class

 
import java.io.*;
public class Record
{
    private String customerId, surname, accNo;
    public Record(String customerId, String surname, String accNo)
    {
        this.customerId = customerId;
        this.surname = surname;
        this.accNo = accNo;
        printRecord();
    }
    public String getCustomerId()
    {
        return customerId;
    }
    public String getSurname()
    {
        return surname;
    }
    public String getaccNo()
    {
        return accNo;
    }
    public void printRecord()
    {
        try
        {
           PrintWriter out = new PrintWriter(new FileOutputStream("Record.txt", true));
           String s = getCustomerId() + "," +  getSurname() +"," + getaccNo() ;
           out.println(s);
           out.close();
        }
        catch(FileNotFoundException e)
        {
           System.out.println("input.txt does not exist");
        }
    }
}
 

Bank

 
import java.util.*;
public class Bank
{
    static ArrayList addAccount = new ArrayList();
    static ArrayList addRecord = new ArrayList();
    public static void main(String args[])
    {
     addAccount.add(new Checking("123456",999.99));
     addRecord.add(new Record("121212","Brian","123456"));
    }
}

so the output file would be
:
record.txt
121212,Brian,123456
Account.txt
123456,999.99
what i wanna do is if like
//get an customerId from input, if (customerId == 121212 && accNO(in record.txt) == accNo(in Record.txt)
display the balance(999.99);
how can i do that, i know i can use String Tokenizer scan the text file, but
any better way to get communication between two files?

[Maverick Lasa]

hello brian,
i think you wanted to write the condition as:

(customerId == 121212 && accNO(in record.txt) == accNo(in [B]Account[/B].txt)

i know i can use String Tokenizer scan the text file
you can use String.indexOf and String.substring which I think is a little bit faster than StringTokenizer. any better way to get communication between two files?

what do you mean by "communication between two files"?
why don't you add a Account.readAccount() and Record.readRecord to get the data from their corresponding files, then use the same account and record instances to compare the account number?
the simple, the better
mavedrive;
[ October 24, 2003: Message edited by: Maverick Lasa ]