#2750번 : 수 정렬하기

문제

코드

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		ArrayList arr = new ArrayList();

		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			arr.add(num);
		}

		Collections.sort(arr, new Comparator() {
			@Override
			public int compare(Integer o1, Integer o2) {
				// 오름차순 (ASC)
				return o1.compareTo(o2);
			}
		});

//		Collections.sort(arr, new Comparator() {
//			@Override
//			public int compare(Integer o1, Integer o2) {
//				// 내림차순 (DESC)
//				return o2.compareTo(o1);
//			}
//		});
		
		for (int i : arr) {
			System.out.println(i);
		}
	}
}

출처

https://www.acmicpc.net/problem/2750