JavaBasicsLogsAggregator

public class First {
    private static List<Person> users = new ArrayList<Person>();

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

        int nums = sc.nextInt();
        sc.nextLine();
        for (int i = 0; i < nums; i++) {
            String[] userInfo = sc.nextLine().split("\\s+");
            String ip = userInfo[0];
            String name = userInfo[1];
            int logs = Integer.parseInt(userInfo[2]);
            if (!userExists(name)) {
                Person user = new Person();
                user.setName(name);
                users.add(user);
            }
            getUser(name).setIp(ip);
            getUser(name).log(logs);
        }

        Collections.sort(users, new Comparator<Person>() {
            public int compare(Person result1, Person result2) {
                return result1.getName().compareTo(result2.getName());
            }
        });

        getUsersInfo();
    }

    private static boolean userExists(String name) {
        for (Person p : users) {
            if (p.getName().equals(name)) {
                return true;
            }
        }
        return false;
    }

    private static Person getUser(String name) {
        for (Person p : users) {
            if (p.getName().equals(name)) {
                return p;
            }
        }
        return new Person();
    }

    private static void getUsersInfo() {
        for (Person p : users) {
            System.out.println(p.getName() + ": " + p.getLogs() + " " + p.getIps());
        }
    }
}

class Person {
    private String _name;
    private List<String> _ips = new ArrayList<String>();
    private int _logs;

    public void setName(String name) {
        this._name = name;
    }

    public void setIp(String ip) {
        if (!this._ips.contains(ip)) {
            this._ips.add(ip);
        }
    }

    public void log(int log) {
        this._logs += log;
    }

    public String getName() {
        return this._name;
    }

    public String getIps() {
        Collections.sort(this._ips, Collections.reverseOrder());
        String ip = "[";
        for (int i = this._ips.size()-1; i >= 0; i--) {
            ip += this._ips.get(i) + ", ";
        }
        ip = ip.replaceAll(", $", "");
        ip += "]";
        return ip;
    }

    public int getLogs() {
        return this._logs;
    }
}