誕生日

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マイコード

import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;

public class Main {
    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    static ArrayList<Student> list = new ArrayList<>();
    public static void main(String[] args) throws IOException {
        int n = Integer.parseInt(br.readLine());
        StringTokenizer st;
        for (int i = 0; i < n; i++) {
            st = new StringTokenizer(br.readLine()," ");
            list.add(new Student(st.nextToken(), Integer.parseInt(st.nextToken()), Integer.parseInt(st.nextToken()), Integer.parseInt(st.nextToken())));
        }
        Collections.sort(list);
        System.out.println(list.get(0).getName());
        System.out.println(list.get(n-1).getName());
    }

    static class Student implements Comparable<Student> {
        private String name;
        private int day;
        private int month;
        private int year;

        public Student(String name, int day, int month, int year) {
            this.name = name;
            this.day = day;
            this.month = month;
            this.year = year;
        }

        @Override
        public int compareTo(Student o) {
            if (this.getYear() < o.getYear())
                return 1;
            else if (this.getYear() > o.getYear()) {
                return -1;
            } else if (this.getMonth() < o.getMonth()) {
                return 1;
            } else if (this.getMonth() > o.getMonth()) {
                return -1;
            } else if (this.getDay() < o.getDay()) {
                return 1;
            }
            return -1;
        }

        public String getName() {
            return name;
        }

        public int getDay() {
            return day;
        }

        public int getMonth() {
            return month;
        }

        public int getYear() {
            return year;
        }
    }
}