[Ch10c] Optional examples

package ch10c;

import java.util.Optional;

public class OptionalExamples {

  public static void main(String[] args) {

    Optional<IceCream> optional = getIceCream("Strawberry");

    IceCream ice = optional.get();

    if (optional.isPresent()) {

      ice.eat();

    } else {

      System.out.println("No ice cream for you!");

    }

  }

  private static Optional<IceCream> getIceCream(String strawberry) {

    return Optional.ofNullable(null);

  }

  private static class IceCream {

    void eat() {

    }

  }

}