题解 | 数组倒转

import java.util.*;

public class Main {
    public static void main(String[] args) {
        int[] arr = new int[6];
        Scanner scanner = new Scanner(System.in);
        for (int i = 0; i < arr.length; i++) {
            arr[i] = scanner.nextInt();
        }
        System.out.println(Arrays.toString(arr));

        //write your code here......
        List<Integer> a = new ArrayList<>(arr.length);//List接口中最常用的ArrayList

        for(int i:arr){//ArrayList是add(),get(),set(),indexof(object o)查找,remove(object o)/(int inedx)
            a.add(i);
        }

        Collections.reverse(a);//为了使用Collections里的reverse方法，将输入数组转为List接口类型以调用

        System.out.println(a.toString());//比起Arrays，List有自己的toString，且不能用Arrays的toString
    }
}