Java Puzzle 7: Cookies

Learn how to count down with Count von Count and Cookie Monster!

If Count has two cookies and Cookie Monster eats one, how many cookies are left?
- One cookie.

Good. If Cookie Monster eats this one cookie, what does Count have left?
- An empty hand, no cookies. And a hungry Cookie Monster.

Great. Now, for the grand finale: if Cookie Monster then eats another cookie, what does Count have in his hand?
- Minus one cookie!

If cookies were Strings, could you write the Cookie Monster? The class Count is given:

package count;

import monster.CookieMonster;

public class Count {
    public static void main(String[] args) {
        String noCookie = CookieMonster.eat("cookie");
        if (noCookie.isEmpty() &amp;&amp; CookieMonster.eat(noCookie).length() < noCookie.length()) {
            // The goal is to reach this line
            System.out.println("Minus one cookie!");
        }
    }
}

Edit the Cookie Monster to make it work:

package monster;

public class CookieMonster {
    public static String eat(String cookie) {
        return cookie.substring(0, cookie.length() - 6);
    }
}

The usual puzzle rules apply (setAccessible() is not allowed!). If you found the solution, post it as a comment here below. These comments stay private, and become public later on the next blog post.