Followers

import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class Followers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        Map<String, Integer> followers = new TreeMap<>();

        String input;

        while (!"Log out".equals(input = scanner.nextLine())) {
            String[] data = input.split(": ");

            String command = data[0];
            String username = data[1];

            switch (command) {
                case "New follower":
                    if (!followers.containsKey(username)) {
                        followers.put(username, 0);
                    }

                    break;
                case "Like":
                    int countOfLikes = Integer.parseInt(data[2]);

                    if (!followers.containsKey(username)) {
                        followers.put(username, countOfLikes);
                    } else {
                        followers.put(username, followers.get(username) + countOfLikes);
                    }

                    break;
                case "Comment":
                    if (!followers.containsKey(username)) {
                        followers.put(username, 1);
                    } else {
                        followers.put(username, followers.get(username) + 1);
                    }

                    break;
                case "Blocked":
                    if (followers.containsKey(username)) {
                        followers.remove(username);
                    } else {
                        System.out.printf("%s doesn't exist.%n", username);
                    }

                    break;
            }
        }

        System.out.printf("%d followers%n", followers.size());

        followers.entrySet().stream()
                .sorted(Map.Entry.<String, Integer>comparingByValue()
                        .reversed()
                        .thenComparing(Map.Entry::getKey))
                .forEach(entry -> System.out.printf("%s: %d%n", entry.getKey(), entry.getValue()));
    }
}