344. 反轉(zhuǎn)字符串

編寫一個(gè)函數(shù)，其作用是將輸入的字符串反轉(zhuǎn)過來。輸入字符串以字符數(shù)組?s?的形式給出。

不要給另外的數(shù)組分配額外的空間，你必須原地修改輸入數(shù)組、使用 O(1) 的額外空間解決這一問題。

示例 1：

輸入：s = ["h","e","l","l","o"]
輸出：["o","l","l","e","h"]

示例 2：

輸入：s = ["H","a","n","n","a","h"]
輸出：["h","a","n","n","a","H"]

提示：

• 1 <= s.length <= 105
• s[i]?都是?ASCII?碼表中的可打印字符

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