here u go dude:

import java.io.*;

public class MyStringTest {

            public static void main(String[] args) throws IOException {

                BufferedReader rd = new BufferedReader (

                new InputStreamReader(System.in));

                System.out.print("Enter the string that needs to be reversed: ");

                 System.out.print("The reversed string is: ");

          for(int i=S.length()-1;i>=0; i--)

char c=S.charAt(i);

System.out.print(c);