题解 | #输入整型数组和排序标识，对其元素按照升序或降序进行排序#

• 简单题简单搞咯，没必要整麻烦
• 投机取巧用Comparator

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

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int s1 = Integer.parseInt(br.readLine());
        String[] s2 = br.readLine().split(" ");
        int s3 = Integer.parseInt(br.readLine());
        Integer[] array = new Integer[s1];
        for (int i = 0; i < s2.length; i++) {
            array[i] = Integer.valueOf(s2[i]);
        }
//        Arrays.sort(array, new Comparator<Integer>() {
//            @Override
//            public int compare(Integer o1, Integer o2) {
//                if (s3==0){
//                    return o1.compareTo(o2);
//                }else {
//                    return o2.compareTo(o1);
//                }
//            }
//        });
        if (s3 == 0) {
            Arrays.sort(array, Comparator.naturalOrder());
        } else {
            Arrays.sort(array, Comparator.reverseOrder());
        }
        for (Integer integer : array) {
            System.out.print(integer + " ");
        }
    }
}