백준[JAVA] 10814.나이순 정렬- 자바

📖 문제

📃 코드

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Comparator;
import java.util.StringTokenizer;

public class Main {
    static String[][] arr;

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int N = Integer.parseInt(br.readLine());
        arr = new String[N][2];

        for (int i = 0; i < N; i++) {
            StringTokenizer st = new StringTokenizer(br.readLine(), " ");
            arr[i][0] = st.nextToken();
            arr[i][1] = st.nextToken();
        }
        ageSort(arr);
    }

    private static void ageSort(String[][] a) {
        Arrays.sort(a,new Comparator<String[]>() {
            @Override
            public int compare(String[] s1, String[] s2) {
                return Integer.parseInt(s1[0]) - Integer.parseInt(s2[0]);
            }
        });

        for(int i=0;i<a.length;i++){
            System.out.println(a[i][0] + " " + a[i][1]);
        }
    }
}

 

🔗 링크

https://www.acmicpc.net/problem/10814

10814번: 나이순 정렬