Untitled

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;

public class Exercise_09_ja {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        LinkedHashMap<String, String> imeStrana = new LinkedHashMap<>();
        LinkedHashMap<String, ArrayList<String>> stranaImena = new LinkedHashMap<>();

        while (true) {

            String unos = sc.nextLine();

            if (unos.equals("Lumpawaroo")) break;

            if(unos.contains(" | ")) {
                String [] nizOdUnosa = unos.split(" \\| ");
                String forceSide = nizOdUnosa[0];
                String forceUser = nizOdUnosa[1];

                if (!imeStrana.containsKey(forceUser) && !stranaImena.containsKey(forceSide)){
                    imeStrana.put(forceUser, forceSide);
                    stranaImena.put(forceSide, new ArrayList<>());
                    stranaImena.get(forceSide).add(forceUser);

                } if (stranaImena.containsKey(forceSide) && !imeStrana.containsKey(forceUser)) {
                    stranaImena.get(forceSide).add(forceUser);
                    imeStrana.put(forceUser, forceSide);
                } //if (imeStrana.containsKey(forceUser)) continue;


            }  else if (unos.contains(" -> ")) {
                String [] nizOdUnosa = unos.split(" -> ");
                String forceSide = nizOdUnosa[1];
                String forceUser = nizOdUnosa[0];

                System.out.printf("%s joins the %s side!\n", forceUser, forceSide);

                if (imeStrana.containsKey(forceUser)) {
                    String prethodniSide = imeStrana.get(forceUser);
                    imeStrana.put(forceUser, forceSide);
                    stranaImena.get(prethodniSide).remove(forceUser);
                    stranaImena.get(forceSide).add(forceUser);

                } if (!imeStrana.containsKey(forceUser) && stranaImena.containsKey(forceSide)){
                    imeStrana.put(forceUser, forceSide);
                    stranaImena.get(forceSide).add(forceUser);

                } if (!imeStrana.containsKey(forceUser) && !stranaImena.containsKey(forceSide)) {
                    imeStrana.put(forceUser, forceSide);
                    stranaImena.put(forceSide, new ArrayList<>());
                    stranaImena.get(forceSide).add(forceUser);
                }
            }
        }
        for(Map.Entry<String, ArrayList<String>> e : stranaImena.entrySet()) {
            String strana = e.getKey();
            ArrayList<String> imena = e.getValue();
            if (!imena.isEmpty()) {
                System.out.printf("Side: %s, Members: %d\n",strana, imena.size());
                for(String s: imena){
                    System.out.printf("! %s\n", s);
                }
            }
        }
    }
}