Leetcode no. 344

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) {
if (s.length()==0) return s;
char[] c= s.toCharArray();
int i=0, j=c.length-1;
while (i<j){
char tmp= c[i];
c[i]=c[j];
c[j]=tmp;
i++; j--;
}
return new String(c);
}
}