Parsing notepad content separated by pipes...urgent!!

Question

Hi there,
I really need your help guys, I need to read the content of a notepad file and then parse it, specifically it's a string just like this one,
AAA_AAAA.01 | BBB_BBBB.01 BBB_BBBB.02 | BBB_BBBB.03 | CCC_CCCC.01 | DDD_DDDD.01 | DDD_DDDD.02 | DDD_DDDD.03 | DDD_DDDD.04....and so on,
and so far I've got only this code
package tokenizer;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
* @author Henz
public class ThreadParser {
public ThreadParser() {
// Auto-generated constructor stub
* @param args
public static void main(String[] args) {
// Auto-generated method stub
String line;
try {
System.out.print("Enter the path: ");
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
String file = stdin.readLine();
BufferedReader sfile = new BufferedReader(new FileReader(file));
File myFile = new File(file);
if (myFile.exists()) {
System.out.println("File founded, preparing parsing...");
} else {
System.out.println("File not founded, verify path...");
while ((( line = sfile.readLine())!= null))
System.out.println(line);
StringTokenizer st = new StringTokenizer(line)//Exactly here I need the string so I can parse it but it returns me a NullPointerEx
while(st.hasMoreTokens())
System.out.println(st.nextToken());
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
But I've got only this output
Enter the path: C:\Test.txt
File founded, preparing parsing...
Exception in thread "main" java.lang.NullPointerException
at java.util.StringTokenizer.<init>(StringTokenizer.java.182)
at java.util.StringTokenizer.<init>(StringTokenizer.java.219)
at tokenizer.ThreadParser.main(ThreadParser.java:54)
The question is, what else do I need so I can get this output ,
AAA_AAAA.01
BBB_BBBB.01 BBB_BBBB.02 BBB_BBBB.03
CCC_CCCC.01
DDD_DDDD.01 DDD_DDDD.02 DDD_DDDD.03 DDD_DDDD.04
The main objective is to parse the string above eliminating its pipes and in each line having just the same type prefix words
Regards!

Answer 1

I will post the bad part of your code, indented correctly:while ((( line = sfile.readLine())!= null))
  System.out.println(line);
StringTokenizer st = new StringTokenizer(line);The first two lines read through the file and copy it to standard output. After they are finished, the "line" variable is null (that's what the "while" does) and then you proceed to try and use it in the third line of code.
In other words, you should surround the code that you want controlled by that "while" by braces. Like this:while ((( line = sfile.readLine())!= null)) {
  System.out.println(line);
  StringTokenizer st = new StringTokenizer(line);
  ... and so on
}If you don't do that then only the single line of code after the "while" statement is in the while-loop.