Write a method that accept a String object as an argument and displays its contents back$-$ward. For instance, if the string argument is "gravity" the method should display "ytivarg". Demonstrate the method by running the following program.

import java.util.Scanner;

public class BackwardString

$\{$

public static void main$($String$[]$ args$)$

$\{$

String input; $//$ Keyboard input

$//$ Create a Scanner object for keyboard input.

Scanner keyboard $=$ new Scanner$($System$.$in$)$;

$//$ Get a string.

System.out.print$("$Enter something: $")$;

input $=$ keyboard.nextLine$()$;

$//$ Display it backward.

backward$($input$)$;

$\}//$end of main

$//$ backward method here

$\}//$ end of class