File processing using Java

[chi_bears]

Hi, I am having trouble with writing multiple records to an output file. I am able to read multiple records from the input file and make some modifications to the individual tokens of the file but when writing to a file, I am overwriting the previous records and thus am able to display only the last record in the output file. How can I write all records from my input file to the output file?

When I use the PrintWriter class as follows,

PrintWriter out = new PrintWriter(new
FileWriter("sri2.dat", true))

I am able to write only the last record (twice). I am
not able to write the records before the last record.
How can I write all the records from the input file
into the output file?

Thanks a lot for your help.

My current code is as follows:
_____________________________________________

import java.io.*;
import java.util.*;

class inputFile
{

private String ordDate;
private String ordNum;
private String custName;
private String custDesc;
private String ccType;
private String newccType;
private String expDate;

public inputFile()
{}

public void readData(BufferedReader in) throws
IOException
{
String s = in.readLine();
StringTokenizer t = new StringTokenizer(s, "|");

ordDate = t.nextToken();
ordNum = t.nextToken();
custName = t.nextToken();
custDesc = t.nextToken();
ccType = t.nextToken();

if (ccType.equals("V") )
newccType = "VI";

expDate = t.nextToken();

System.out.println(ordDate);
}

public void writeData(PrintWriter out) throws
IOException
{
out.println(ordDate + "|" +
ordNum + "|" +
custName + "|" +
custDesc + "|" +
newccType + "|" +
expDate);
}
}

class readFile2
{
public static void main(String args[])
{
inputFile inp = new inputFile();

// Read the input file
try
{
BufferedReader in = new BufferedReader(new
FileReader("orders.dat"));

//inputFile ipf = readData(in);
inp.readData(in);
in.close();
}

catch(IOException e)
{
System.out.print("Error reading from the file : " +
e);
System.exit(1);
}


// Write the contents to a new file
try
{
PrintWriter out = new PrintWriter(new
FileWriter("sri2.dat", true));

inp.writeData(out);
out.close();
}

catch(IOException e)
{
System.out.print("Error reading from the file : " +
e);
System.exit(1);
}

}
}
_____________________________________________

[ArchAngel]

You're asking way too many questions at once. If I understand it you want to be able to append to a file rather than overwriting its contents each time. To do this you need to use the following constructor of FileOutputStream:

FileOutputStream(String name, boolean append)

If you pass in 'true', it will append to the file.