Question

The Builder class that is embedded in the Person class has a method setJobEmail(...). What kind of object does this return?

Answer 1

The `setJobEmail(...)` method in the Builder class embedded in the Person class typically returns the Builder object itself. This is a common pattern used in the Builder design pattern.

The Builder pattern is often used for constructing complex objects step by step. The idea is to have a dedicated builder class with methods for setting various attributes of the object being constructed. Each method in the builder class typically modifies the internal state of the builder and returns the builder object itself.

So, when you call `setJobEmail(...)`, it sets the job email attribute in the builder and returns the builder object. This allows for method chaining, where you can call multiple setter methods in sequence. Finally, when you're ready to build the actual object, you call a build method that returns the fully constructed object based on the accumulated state in the builder.

Answer 2

The setJobEmail() method within the Builder class, which is embedded in the Person class, returns: an object of the Builder class itself.

Step-by-step explanation:

In the Builder design pattern, the Builder class is responsible for creating and configuring objects. It provides methods for setting different attributes or properties of an object. In this case, the setJobEmail() method is used to set the job email of a person.

When the setJobEmail() method is called, it updates the job email attribute of the Builder object and returns the Builder object itself. This allows for method chaining, where multiple methods can be called in succession to set different attributes of the object.

For example, consider the following code:

Person.Builder personBuilder = new Person.Builder();

personBuilder.setJobEmail("john.doe(at)example.com")

.setName("John Doe")

.setAge(25);

In this code, the setJobEmail() method is called on the personBuilder object, which updates the job email attribute to "john.doe(at)example.com" and returns the personBuilder object. The setName() and setAge() methods are then called on the same object, allowing for the settin