ForceBook

package O7AssocietiveArrays.Exercise;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.TreeSet;

public class O9ForceBookMe {
    public static void main(String[] args) throws IOException {
        BufferedReader reader =
            new BufferedReader(
                new InputStreamReader(
                    System.in
                )
            );

        LinkedHashMap<String, TreeSet<String>> profileInfo =
                new LinkedHashMap<>();

        String input;

        while (!"Lumpawaroo".equalsIgnoreCase(input=reader.readLine())) {
            String[] tokens = input.split("\\s+\\|\\s+|\\s+->\\s+");

            String forceSide;
            String forceUser;

            if (tokens.length > 1) {
               if (input.contains("|")) {
               forceSide = tokens[0];
               forceUser = tokens[1];

               if (!profileInfo.containsKey(forceSide)) {
                   profileInfo.put(forceSide, new TreeSet<>());
                   profileInfo.get(forceSide).add(forceUser);

               } else {
                   for (Map.Entry<String, TreeSet<String>> kvp : profileInfo.entrySet()) {
                       if (!kvp.getValue().contains(forceUser)
                               && kvp.getKey().contains(forceSide)) {

                           kvp.getValue().add(forceUser);

                           break;
                       }

                   }

               }

            } else {
                forceSide = tokens[1];
                forceUser = tokens[0];

                profileInfo
                        .forEach((key, value) ->
                                value.remove(forceUser));

                if (!profileInfo.containsKey(forceSide)) {
                    profileInfo
                            .put(forceSide, new TreeSet<>());

                    profileInfo
                            .get(forceSide)
                            .add(forceUser);

                    System.out.println(String.format("%s joins the %s side!",
                            forceUser,
                            forceSide));
                } else {
                    profileInfo
                            .get(forceSide)
                            .add(forceUser);

                    System.out.println(String.format("%s joins the %s side!",
                            forceUser,
                            forceSide));
                    }

                }

            }
        }

       profileInfo
               .entrySet()
               .stream()
               .sorted((meSecond, meFirst) -> {
                   int sort = Integer.compare(meFirst.getValue().size(),
                           meSecond.getValue().size());

                   if (sort==0) {
                       sort=meSecond.getKey().compareTo(meFirst.getKey());
                   }
                   return sort;
                       })

       .forEach(littleFuck -> {
           if (littleFuck.getValue().size() > 0) {
               System.out.println(String.format("" +
                       "Side: %s, Members: %d",
                       littleFuck.getKey(),
                       littleFuck.getValue().size()));

               littleFuck
                       .getValue()
                       .forEach(e->
                               System.out.println(String.format(
                                       "! %s",
                                       e
                               )
                               )
                       )
               ;
           }
       }
       );

    }
}