Hi,

I am trying to read records from a multi-record pipe ("|") delimited file, make some modifications to the data elements and write the records to an output file. I am using the "StringTokenizer" class to read the file and access individual tokens and I am using the "PrintWriter" class to write to an outout file.

The problem is, I am only able to write the last record to the output file, though I am able to read all the records from the input file. I think I am overwriting the previous records and am able to write and display only the last record. How can I write all the records I read into an output file? My current code is listed below:

Also, when I read from a pipe delimited file using as follows,

StringTokenizer t = new StringTokenizer(s, "|")

if the input file has a null value, I am unable to read it. For example, if the input file is like this:

XYZ|ABC||TTT|YYY

I am able to read the first two values, XYZ and ABC but am unable to read the 3rd value, which is null. How can I read this null value using the StringTokenizer class?


The following is my current code. Thanks a lot for your help.
__________________________________________________
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"));

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

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

}
}