344. Reverse String
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) {
char[] chars = s.toCharArray();
int l =0, r = chars.length-1;
while(l < r){
char tmp = chars[l];
chars[l] = chars[r];
chars[r] = tmp;
l++;
r--;
}
return new String(chars);
}
}