User Logs

import java.util.*;

/**
 * Created by Marina on 21.3.2017 г..
 */
public class UserLogs {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        //create data structure for the users with ips
        TreeMap<String,LinkedHashMap<String, Integer>> usersIPs=new TreeMap<>();

        while(true){
            String input=scanner.nextLine();
            if("end".equals(input)){
                break;
            }else{
                String[] parts=input.split(" ");
                String ip=parts[0].split("=")[1];
                String messages=parts[1].split("=")[1];
                String username=parts[2].split("=")[1];

                LinkedHashMap<String,Integer> newData=new LinkedHashMap<>();
                
                
//check if the user exists
                if(usersIPs.containsKey(username)){
//check if the linkedHashMap contains the ip, if not-add it, if yes- increment the value
                    //this line seems to be the problem
                    if(usersIPs.get(username).containsKey(ip)){
                        int countUpdate=usersIPs.get(username).get(ip)+1;
                        newData.put(ip,countUpdate);
                        usersIPs.put(username,newData);

                    }
                    else {
                        newData.put(ip,1);
                        usersIPs.put(username,newData);

                    }
                }
                else{
                    newData.put(ip,1);
                    usersIPs.put(username,newData);
                }

            }
        }

//print the treemap
        for (String user : usersIPs.keySet()) {
            System.out.println(user+": ");
            LinkedHashMap<String, Integer> ipAndCount = usersIPs.get(user);
            for (Map.Entry<String,Integer> entry : ipAndCount.entrySet()) {
                System.out.print(entry.getKey()+" => "+ entry.getValue()+", ");
            }
            System.out.println();
        }
    }
}