Blue j program to seperate characters

Character separator 

import java.util.*;

class charseperate

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

String a;

int b,rev;

System.out.println("Enter a String");

a=sc.nextLine();

b=a.length();

for (int i=b-1;i>=0;i--)

{

System.out.println(a.charAt(i));

}

}

}