344.反转字符串

LeetCode链接: https://leetcode.cn/problems/reverse-string/ (opens new window)

题目描述: 原地反转字符数组char[s]

输入：s = ["h","e","l","l","o"]
输出：["o","l","l","e","h"]

• 申明左右指针，左边代表首字母，右边代表位字母
• 首字母与倒数第一个字母交换
• 第二个字母与倒数第二个字母交换
• 重复以上过程，直到走到中间位置的字母为止

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