Extra-terrestrials Java

Question

Ok I'm dumb in Java but why am I getting an error.

import java.util.Scanner;
public class Program
{
public static void main(String[] args) {
Scanner stri = new Scanner(System.in);
String str = stri.next();

for (int i = str.length() - 1; i >= 0; i--) {
System.out.println(str[i]);
}
}
}

It says str is not an array

Answer 1

String doesn't work with [] but with a method which is called charAt ()
So change this line to this:
System.out.println (str.charAt (i));

Answer 2

Epsilon Yes str is not an array. It's a string. To convert into array just use split method with seperator like

String str = "AJ Anant";
//here str is String because of keyword String

String [] strArr = str.split(" ");
//strArr is array because of []

Answer 3

Hint: there is an easy way in the StringBuilder class to do this (reverse a String)
You could also convert the string to a char array.