Need help parsing and large file reading-urgent please

Question

import java.io.*;
import java.lang.String.*;
import java.util.*;
public class ReadFile {
//--------------------------------------------------< main >--------//
public static void main (String[] args) {
ReadFile t = new ReadFile();
t.readMyFile();
//--------------------------------------------< readMyFile >--------//
void readMyFile() {
String line = null;
String dcn = null;
String pfn = null;
String pln = null;
String pdob = null;
String ssd = null;
try {
FileReader fr = new FileReader("C:\\ClaimsData\\ClaimsExtract.txt");
BufferedReader br = new BufferedReader(fr);
line = new String();
while ((line = br.readLine()) != null) {
//A00002314376A5272201102300000000MASARU OKUDA 1933012520050722B101 20051001
//Each line of ClaimsExtract.txt is exactly in above form
// and there are about 1000 such lines
dcn = new String();
pfn = new String();
pln = new String();
pdob = new String();
ssd = new String();
dcn = line.substring(13,24);
pfn = line.substring(32,42);
pln = line.substring(42,57);
pdob = line.substring(57,65);
ssd = line.substring(65,73);
//System.out.println(dcn+" "+pfn+" "+pln+" "+pdob+" "+ssd);
fr.close();
} catch (IOException e) {
// catch possible io errors from readLine()
System.out.println("Uh oh, got an IOException error!");
e.printStackTrace();
} // end of readMyFile()
} // end of class
java.io.IOException: Stream closed
     at sun.nio.cs.StreamDecoder.ensureOpen(StreamDecoder.java:37)
     at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:152)
     at java.io.InputStreamReader.read(InputStreamReader.java:167)
     at java.io.BufferedReader.fill(BufferedReader.java:136)
     at java.io.BufferedReader.readLine(BufferedReader.java:299)
     at java.io.BufferedReader.readLine(BufferedReader.java:362)
     at ReadFile.readMyFile(ReadFile.java:32)
     at ReadFile.main(ReadFile.java:14)
Uh oh, got an IOException error!
I also tried using Tokenizer but some other errors, Please suggest a better approach
urgent , Thanks in Advance

Answer 1

i think your while loop has the problem. It's keep continuing to read the next line in the file and doesn't exit even when it reaches the end of file. Therefore it gives you that error. Since you're using variable line as string object hence for the while loop you should've something like this and i would also move the reading next line part just before ending the while loopwhile ( ! line.equals(null) ) {
       line = br.readLine();
}//end of while because string object doesn't work for comparing operators == or != so you always have to use string.equlas()
I'm sure that's the reason you're encountering this error, otherwise please specify the line where you're encountring the problem. Next time please use the tags for your code becuase it formats the code nicely and it's easy to read it. Cheers
Message was edited by:
        salubadsha