runtime error reading data from text file

From: Robocop (rob-cop_at_excite.com)
Date: 02/29/04 

Date: 28 Feb 2004 16:21:23 -0800

Hi folks please help me figure out whats wrong with this code i have
shown which part is giving run time error (below code is the
datafile!).....

please read its pretty simple just few bugs !

import type.lang.*;
import type.lib.*;
import java.util.*;

public class Check0

{
 public static void main(String []args)
 {
  IO.println("Enter name, limit, and trx filename
(comma-delimited):");
  String finstr = "PCL";
  StringTokenizer tok = new StringTokenizer(IO.readLine() ,",");
  
  String name = tok.nextToken();
  String limit = tok.nextToken();
  String file = tok.nextToken();
  double num = Double.parseDouble(limit);
  CreditCard card = new CreditCard(2343,name,num);
  UniReader ur = new UniReader(file);
  
  int count = 0; //00001 counter
  
  for (String str = ur.readLine(); !ur.eof(); str = ur.readLine())
  {
   count++; //counts no. of records.
   StringTokenizer tok2 = new StringTokenizer(str);
   IO.print(count, "5Z");
   if(str == "")
   {
    IO.println(" invalid record.");
   }
   for (;tok2.hasMoreTokens();)
   {
   String tranin = tok2.nextToken().toUpperCase();
   String trancode = "" + tranin.charAt(0);
 //FOLLOWING PART IS GIVING RUNTIME ERROR!!!
   String stra = tok2.nextToken(); //gets p550.. from data file given
below
   
   IO.print(stra.charAt(0));
  if(finstr.charAt(finstr.indexOf(stra.charAt(0))) == stra.charAt(0));
  
 String stram = stra.substring(1, stra.length());
 //??????????????????OVER???????????????????????????????????/
   double amount = Double.parseDouble(stram);
   trancode.toUpperCase();
   
   IO.print(" "+trancode);
   IO.print(amount, "10.2");
   if (trancode.equals("C") && card.charge(amount))
   {
    IO.print(" done.","10.2L");
   }
   else if (trancode.equals("P"))
   {
     card.pay(amount);
     IO.print(" done.","10.2L");
   }
   else if (trancode.equals("L") && card.setLimit(amount))
   {
    IO.print(" " +"done.","10.2L");
   } else{
    IO.print(" " +"rejected.","10.2L");
   }
   IO.println();
   
   } //end of hasMoreTokens();
   
  } // end of tokenizer
   
  
  IO.print("Card Balance = ");
  IO.print(card.getBalance(), "10.2");
  IO.println();
  IO.print("Credit Limit = ");
  IO.print(card.getLimit(), "10.2");
   
   }
}

_____________________________

c 500
c 2100
   p550 // <==problem line
  c 5950
c 3000

l4000 // <== problem line
p 4050
        l 2500
c 2750
  p 500
c 200
  p 1000
_____________________________

thanks a lot for your help!!! :)

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