Write a function that takes a string as input and returns the string reversed.
Example:
Given s = "hello", return "olleh".
class Solution {
public String reverseString(String s) {
char[] ch = s.toCharArray();
int start = 0;
int end = s.length() - 1;
while (start < end) {
char temp = ch[start];
ch[start] = ch[end];
ch[end] = temp;
start++;
end--;
}
return new String(ch);
}
}
344. Reverse String
原文：https://www.cnblogs.com/MarkLeeBYR/p/10678211.html
