Reverse string in Java

This java program reverses a string entered by the user. We use charAt method to extract characters from the string and append them in reverse order to reverse the entered string.
import java.util.*;
 
class ReverseString
{
   public static void main(String args[])
   {
      String original, reverse ="";
      Scanner in = new Scanner(System.in);
 
      System.out.println("Enter a string to reverse");
      original = in.nextLine();
 
      int length = original.length();
 
      for ( int i = length - 1 ; i >= 0 ; i-- )
         reverse = reverse + original.charAt(i);
 
      System.out.println("Reverse of entered string is "+reverse);
   }
}