LeetCode-反转字符串-简单

LeetCode-反转字符串-简单 标题：344反转字符串-简单 题目

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 s 的形式给出。

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

示例1

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

示例2

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

提示

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

代码Java

public void reverseString(char[] s) {
    int start = 0;
    int end = s.length - 1;
    while (start < end) {
        char temp = s[start];
        s[start] = s[end];
        s[end] = temp;
        start ++;
        end --;
    }
}