백준 11651번 - 좌표 정렬하기 2 (Java 8)

https://www.acmicpc.net/problem/11651

11651번: 좌표 정렬하기 2

좌표 정렬하기 1에서 순서만 바꿨다.

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

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int numOfCase = Integer.parseInt(br.readLine());
        int[][] coordinates = new int[numOfCase][2];
        StringTokenizer st;
        for(int i=0; i<numOfCase; i++){
            st = new StringTokenizer(br.readLine());
            int x = Integer.parseInt(st.nextToken());
            int y = Integer.parseInt(st.nextToken());
            coordinates[i][0] = x;
            coordinates[i][1] = y;
        }

        Arrays.sort(coordinates, (
                int[] x1, int[] x2 ) -> {

            if(x1[1] == x2[1]){
                return x1[0] - x2[0];
            }
            return  x1[1] - x2[1];
        });
        StringBuilder sb = new StringBuilder();
        for(int i=0; i<coordinates.length; i++){
            sb.append(coordinates[i][0]).append(" ").append(coordinates[i][1]).append("\n");
        }
        System.out.println(sb);
    }
}