Opinion Poll

package com.company;


import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {
    static class Person {

        private String name;
        private int age;

        public Person(String name, int age) {

            this.name = name;
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

        @Override
        public String toString() {
            return String.format("%s - %d", name, age);
        }
    }

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        List<Person> persons = new ArrayList<>();

        for (int i = 0; i < n; i++) {
            String[] line = scanner.nextLine().split(" +");
            String name = line[0];
            int age = Integer.parseInt(line[1]);

            Person person = new Person(name, age);

            if (age > 30) {

                persons.add(person);
            }

        }
        persons.sort((f, s) -> f.getName().compareTo(s.getName()));

        for (Person person : persons) {
            System.out.println(person);
        }


    }

}