leetcode 344. Reverse String

题目：

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

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

public class Solution {
    public String reverseString(String s)  {
        int left = 0;
           int right = s.length() - 1;
           char[] strChar=s.toCharArray();
        while (left<right)
        {
            char temp=strChar[left];
            strChar[left]=strChar[right];
            strChar[right]=temp;
            left++;
            right--;
        }
        return new String(strChar);
    }
}