反转字符串～字节题库

344. 反转字符串

Difficulty: 简单

编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 char[] 的形式给出。

不要给另外的数组分配额外的空间，你必须修改输入数组、使用 O(1) 的额外空间解决这一问题。

你可以假设数组中的所有字符都是 码表中的可打印字符。

示例 1：

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

示例 2：

输入：["H","a","n","n","a","h"]
输出：["h","a","n","n","a","H"]

Solution

Language: java

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