[Eranga]

Ok, but it's better to explore something on it. Actually I have to work a lot to fill your requirement. Simply I can do this for you. Change the main method as follows.

Code:

	public static void main(String args[]) throws Exception{
		// TODO Auto-generated method stub		
		String inputFile = null;
		String searchString = null;
		String outputFile = null;
                do {
                    System.out.print("Enter Input File: ");
                    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                    inputFile = br.readLine();		

                    System.out.print("Enter Search String: ");
                    BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
                    searchString = br1.readLine();		
                    
                    System.out.print("Enter Output File: ");
                    BufferedReader br2 = new BufferedReader(new InputStreamReader(System.in));
                    outputFile = br2.readLine();		
                    ReadLogFile logfile = new ReadLogFile();
                    List log = new ArrayList();
                    log = logfile.readFile(inputFile,searchString);
                    
                    System.out.println("Reading log file completed:|");
                    logfile.writeFile(log,outputFile);
                }while(true);
	}