【Leetcode】Reverse String

题目链接：https://leetcode.com/problems/reverse-string/

题目：

Write a function that takes a string as input and returns the string reversed.

Example:

Given s = "hello", return "olleh".

思路：

easy

算法：

public String reverseString(String s) {
    char ss[] = s.toCharArray();
    for (int i = 0; i < ss.length / 2; i++) {
        char tmp = ss[i];
        ss[i] = ss[ss.length - 1 - i];
        ss[ss.length - 1 - i] = tmp;
    }
    return new String(ss);
}