How to locate a phrase in a file and read the file after that location

Question

I have a text file with the following contents
Previous date data.....[10,000 lines ]
same as below but with earlier dates
* ABC  AutoJournal Utility - Version 2.00 *
Beginning Reportournal at (time): Tue May 04 18:07:46 IST 2010
AutoJournal assigned updated records a timestamp of (server time):  *2010-05-04*  //THIS IS THE PHRASE  i am looking for
#  Posted Date,           Policy,  Reason, Amount, Insured Name, Agent Name
1) 2010-04-26 00:00:00.0, 7363496, GRSS, 10.0, KRASSNER W, BROOKS STEVEN E
2) 2010-04-23 00:00:00.0, 4768200, GRSS, 0.0, STECKLER M, STECKLER GIBSON
3) 2010-04-20 00:00:00.0, 7328358, GRSS, 4.0, LYON GREGO, WEST MICHAEL J
4) 2010-04-20 00:00:00.0, 4754236, GRSS, 0.0, PEEBLES JA, HOFFMANN GABRIE
5) 2010-04-22 00:00:00.0, 7363793, GRSS, 2.0, LAHAYE NAN, GONYEA MICHAEL
6) 2010-04-26 00:00:00.0, 7360935, GRSS, 35.0, AMITAY NOA, WIESEL HENRYI need to locate the date and start reading the data for the current date only i.e Today's date
Thus far i have done this....
it's just the outline
String srchDate="2010-05-04";
BufferedReader bf=null;
               try {
                      bf = new BufferedReader(new FileReader("C:\\File.log"));
                   int lineID = 0;  
                   Pattern pattern =  Pattern.compile(srchDate);  
                   Matcher matcher = null;  
                   String line =null;
                      while((line=bf.readLine())!=null){ 
                             System.out.println(line);
                                lineID++;  
                                matcher = pattern.matcher(line);      //Will match the entire line against srchDate and will return false ...
                                if( matcher.find()){  
                                    //do stuff...      //stuck here
                                      //get the line no..
                    } catch (Exception e) {
                         e.printStackTrace();
                    }     Some help on this would be very helpful...
Thanks :)
P.S:This needs to be done using java 1,4 only

Answer 1

kevinaworkman wrote:
RainaV wrote:
kevinaworkman wrote:
If I were you, I would split your problem up into smaller pieces.
Write a method that reads a file into a String.This file is actually quiet huge i am not sure if this would work as the file will only grow in size in the future....How big is "quiet huge"? I wouldn't worry about optimization until you've actually encountered a problem.FYI The file size is 20MB ...
>
Write a method that figures out where in a String a substring occurs (hey, that one might be done for you already...).
Write a method that returns a substring of a String, based on a start index and a length (something tells me this one might exist already too).
Write a method that converts a String to the correct datatype.
Regarding these steps i am not sure if i follow>>
the lines you see 1)....
2).... till last line say 800..
I don't understand your question.I was wondering if your appraoch would be complicated but will give it a try...
>
Actually i thght i would just read one complete line and store that in an list and then write it to an excel sheet...Okay, and the steps I outlined would work for reading in one line at a time, as well. It's just one more step.
i am unable to locate this phrase using regex so can you suggest something on that lines
You're trying to find today's date? Why does that require a regular expression?I want to read the data after i have located today's date in the Text file so i need to locate it first but the code i posted doesn't work so i suggested if you can advice on the correction....as per my approach mentioned in the original post
But if i do it your way then definately no need for regex i need to store all of it in a string and work woth sub strings so on,...