toficzak

	public void settingThings(Address address, AddressDTO addressDTO) {
		Optional.ofNullable(addressDTO.getDescription()).ifPresent(address::setDescription);
		Optional.ofNullable(addressDTO.getStreet()).ifPresent(address::setStreet);
		Optional.ofNullable(addressDTO.getZip()).ifPresent(address::setZip);
		Optional.ofNullable(addressDTO.getCity()).ifPresent(address::setCity);
	}

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	@Test
	public String gettingDeskOwnerPrettyWay(School school) {
		return Optional.ofNullable(school)
			.map(School::getClassroom)
			.map(Classroom::getDesk)
			.map(Desk::getOwner)
			.map(User::getName)
			.orElse("");
	}

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	@Test
	public String gettingDeskOwnerUglyWay(School school) {
		if (school.getClassroom() != null) {
			Classroom classroom = school.getClassroom();
			if (classroom.getDesk() != null) {
				Desk desk = classroom.getDesk();
				if (desk.getOwner() != null) {
					User owner = desk.getOwner();
					if (owner != null)
						return owner.getName();

toficzak

@Test
public void OptionalIfElse() {
	String cat = new String("Cat without a tail");
	String dog = null;
	
	Optional.ofNullable(cat).ifPresentOrElse(c -> System.out.println(cat), () -> System.out.println("No cat."));
	Optional.ofNullable(dog).ifPresentOrElse(c -> System.out.println(dog), () -> System.out.println("No dog."));
}

toficzak

if(Optional.of(something).isPresent())
{
  doSomething();
}
else
{
  doSometingElse();
}

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using UnityEngine;

class SnakeSequenceFactory : MonoBehaviour
{
    public static GameObject headPrefab = (GameObject) Resources.Load("HeadPrefab");
    public static GameObject bodyPrefab = (GameObject) Resources.Load("BodyPrefab");
    public static GameObject tailPrefab = (GameObject) Resources.Load("TailPrefab");

    public static GameObject createHeadController(Vector2 position) {
        return Instantiate(headPrefab, position, Quaternion.identity);