JAVA Program to reverse a string

 Program to reverse a string  
 import java.util.Scanner;  
 public class JavaExample {  
   public static void main(String[] args) {  
     String str;  
     System.out.println("Enter your username: ");  
     Scanner scanner = new Scanner(System.in);  
     str = scanner.nextLine();  
     scanner.close();  
     String reversed = reverseString(str);  
     System.out.println("The reversed string is: " + reversed);  
   }  
   public static String reverseString(String str)  
   {  
     if (str.isEmpty())  
       return str;  
     //Calling Function Recursively  
     return reverseString(str.substring(1)) + str.charAt(0);  
   }  
 }