백준 10814 자바 : 나이순 정렬

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

10814번: 나이순 정렬

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import java.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) throws IOException{
    	
    	Scanner scan = new Scanner(System.in);
    	int _case = scan.nextInt();
    	
    	String[][] arr= new String[_case][2];
    	
    	for(int i=0;i<_case;i++) {
    		arr[i][0]=scan.next();
    		arr[i][1]=scan.next();
    	}	

    	Arrays.sort(arr, 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<_case;i++) {
    		System.out.println(arr[i][0]+" "+arr[i][1]);
    	}
    	
    	
    }
}