Reading .log file & Sorting input

Question

Hello all
Currently I'm working on a projekt were I have to read a "in.log" file, sort it and save it to another "out.log" file, the contents of the in.log file is:
[204.0.44.73]: Dir: path
[204.0.44.73]: Dir: path
[204.0.44.74]: Dir: path
[204.0.44.73]: Dir: path
[204.0.44.74]: Dir: path
and so on, now what I have to end up with is this in the out.log:
#1
[204.0.44.73]: Dir: path
[204.0.44.73]: Dir: path
[204.0.44.73]: Dir: path
Count = 3
#2
[204.0.44.74]: Dir: path
[204.0.44.74]: Dir: path
Count = 2
It's for the system administrator at school who doesn't want to do it himself but wants to pay an amount for me to do it (very small amount). I'll pay max duke dollars for a reply which can help me..
Please help, thx in advance

Answer 1

I must be really bored... Use it with "java Parser <logname>"
import java.io.*;
import java.util.*;
public class Parser{
     public void splitLog( File input ){
          try{
               FileInputStream fis = new FileInputStream( input );
               BufferedReader br = new BufferedReader( new InputStreamReader( fis ) );
               Hashtable hosts = new Hashtable();
               String line;
               while( ( line = br.readLine() ) != null ){
                    StringTokenizer st = new StringTokenizer( line, "]" );
                    if( st.hasMoreTokens() ){
                         String host = st.nextToken();
                         if( host.trim().startsWith("[") ){
                              host = host.trim().substring(1);
                         if( !hosts.containsKey( host ) ){
                              hosts.put( host, new Vector() );
                         Vector v = (Vector)hosts.get( host );
                         v.addElement( line );
               Enumeration enum = hosts.keys();
               while( enum.hasMoreElements() ){
                    String host = (String)enum.nextElement();
                    Vector v = (Vector)hosts.get(host);
                    FileOutputStream fos = new FileOutputStream( host + ".log" );
                    for( int i = 0; i < v.size(); i++ ){
                         line = (String)v.elementAt( i );
                         fos.write( (line + "\r\n").getBytes());
                    fos.close();
          catch( Exception e ){
               e.printStackTrace();
     public static void main( String[] args ){
          File input = new File( args[0] );
          Parser parser = new Parser();
          parser.splitLog( input );
}