Java: Return sensible default and avoid NullPointerException in deep hierarchical object tree

Main.java

import java.util.Optional;

public class Main {

  public static void main (String[] args) {
    Apple apple = new Apple();
    Banana banana = new Banana();
    apple.setBanana(banana);

    Coconut coconut = new Coconut();
    banana.setCoconut(coconut);

    Durian durian = new Durian();
    durian.setName("AAA");
    coconut.setDurian(durian);

    String duriaName = Optional.ofNullable(apple)
                        .map(Apple::getBanana)
                        .map(Banana::getCoconut)
                        .map(Coconut::getDurian)
                        .map(Durian::getName)
                        .orElse(null);

    System.out.println(duriaName);
    //Output: AAA
    
    apple = null;

    duriaName = Optional.ofNullable(apple)
                  .map(Apple::getBanana)
                  .map(Banana::getCoconut)
                  .map(Coconut::getDurian)
                  .map(Durian::getName)
                  .orElse(null);
    //Output: null
  }
}