一、题目描述

二、提交代码

class Solution {
    public void reverseString(char[] s) {
        int left =0;
        int right = s.length-1;
        while(left<right){
            char temp = s[left];
            s[left++] = s[right];
            s[right--] = temp;
        }
    }
}

三、代码思路

双指针