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#

简单的利用arrays.sort进行升降排序

import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        Integer arr[] = new Integer[num];
        for(int i = 0;i<arr.length;i++){
            arr[i] = sc.nextInt();
        }
        Arrays.sort(arr);
        int chos = sc.nextInt();
        
        if(chos == 0){
            for(int i = 0;i<arr.length;i++){
                System.out.print(arr[i] + " ");
            }
            
        }
        else if(chos == 1){
            for(int i = arr.length - 1;i >= 0;i--){
                System.out.print(arr[i] + " ");
            }
        }
    }
}