LeetCode--Reverse String

Ideas:

    Traverse the string from the back, add each character to the character array, and finally convert it to string format.

class Solution {
    public String reverseString(String s) {
        char[] res=new char[s.length()];
        for(int i=s.length()-1;i>=0;i--){
            int pos=s.length()-1-i;
            res[pos]=s.charAt(i);
        }
        
        return String.valueOf(res);
    }
}