Reverse a String using CharAt(i)

public class ReverseString{
public static void main(String args[])
{

String original="Hello";
String rev="";
int len=original.length();
for(i=len-1;i>=0;i--){
rev=rev+original.charAt(i)
}
System.out.println("original String is"+original);
System.out.println("reverse String is"+rev);
}}