题解 | #数组倒转#

import java.util.Arrays; import java.util.Scanner;

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......
    int left=0,right=arr.length-1;//双指针从首尾开始
    while(left<right){
        int temp=arr[left];//交换指针元素
        arr[left]=arr[right];
        arr[right]=temp;
        left++;//指针向中间靠
        right--;
    }

    System.out.println(Arrays.toString(arr));
}

}